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Archive page lens news rumours for 2018

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Archive page of lens news and rumours from 2018

Rumours, news and patents for Canon Lenses and other lens info

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Archived rumours / news / patents and product info related to lenses – mostly Canon and Canon fit.

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What does the RF mount mean for EF/EF-M? …an historical perspective

2018 December

28th A short note from Irix about RF mount compatibility:

“We would like to announce and confirm that there are no issues with Irix lenses, as regards their general operation for the Canon EF mount in their current line-up when used on the Canon EOS R camera, and as released by the Canon Corporation via their Canon EOS R Adapter (Canon EF to Canon EOS R mount).
Thanks to this, it is possible to control the aperture from the camera, information about the distance transmitted to which the lens is focused, and to save full information about the exposure parameters in the EXIF format.
-Irix 11mm f/4
-Irix 15mm f/2.4
-Irix 150mm f/2.8 1:1 Macro”

(Note: I’ve a review of the Irix 15/2.4 if you’re curious)

A US patent application [USPTO] looks at converter designs. In particular, these address the issue of using lenses with larger sensors than originally intended, where a longer focal length is desired.

Canon teleconverter

600/4 and 500/4 designs using diffractive (DO) elements feature in a US patent application [USPTO]

600/4 DO

If you’re curious about some of the mechanical and electrical aspects of the RF mount, they are described in a Canon US patent application [USPTO] – with details about how the electrical contacts work with misaligned elements.

27th Some RF full frame macro [1:1] lens designs appear in a Japanese patent application from Canon [HL via Google] Although not shown specifically in the diagrams, they are IS lenses. The text mentions the L12 group for IS – much further forward than the normal positioning for IS

At f/2.8 and ~90mm they give another hint as to how Canon will manage the EF->RF transition in the coming years.

rf macro design 1rf macro design 2


19th Just the sort of thing you might think of doing, but only with a scrap lens (I have one in my desk drawer awaiting another attempt at re-assembly)

Lens Rentals strip down the new EF 400mm F2.8L IS III [LR]

17th An interesting look at the RF35mm F1.8 IS STM Macro at TDP

sensor and xcd21I’ve been trying out the Hasselblad XCD21/4 lens in my recent short review of the X1D-50C.

It’s ~17mm equivalent on 35mm, so an interesting comparison with my TS-E17

At DCWatch, there is an article [Google xlt] covering the ‘Merits of the large RF mount’

It takes a bit of working through the translations, but I note how the large mount gives a much better symmetry to designs. large rear elements let you reduce stuff at the front, such as this diagram covering the EF35/2 and RF 35/1.8


Note how the RF design doesn’t need such a huge front element.


Of course, you also get to make the whole lens shorter as well.

I note the mention of EF-M:

“Initially, Canon also considered to realize a 35 mm full size with the EF-M mount of the APS – C mirrorless “EOS M” series, but satisfactory results were not obtained”

I’ll assume the mention of the ‘too small EF-M mount’ might be taken as a bit of a dig at others ;-)

14th The lens patent info keeps coming, with a Canon RF 28-70mm f/2.2-f/2.8 design [CN]

Lens rentals have a look inside the RF 50/1.2 [LR]

“It is the best of lenses, it is the worst of lenses, it is the lens of perfection, it is the lens of complexity, it is the lens of new technology, it may be the lens of non-repairability. “

13th A design for a soft focus adapter appears in a Canon US patent application [USPTO]

It’s the two element (red) group at the back of this example from the application.

soft focus adapter

It’s included with several example lenses in front of it, giving examples covering a range of specs 24/1.4, 35/1.4 and 130/2.

The specs point towards full frame sensors and backfocus distances which could fit with having the soft focus element inside an EF->RF adapter.

Another idea to make you EF lenses just that bit more useful when switching to EOS-R?

6th Some lens patent applications include a 24-105 f/4 RF mount version [USPTO]

rf24-105 f4

and a RF version of the 24-70 f/4 [USPTO]

rf24-70 f/4

Several Canon US patent applications [USPTO #1, #2  ] look at making adapters smarter, with improved communications between camera and what’s attached to it.  Whilst there are no details it looks as if this includes different lens types

adapter comms

The patents shows several example mounts including a locking type.

bayonet mount

It seems we’re getting a rush of lens/adapter/camera comms designs with a third patent application [USPTO] looking at multiple communications channels (similar to the diagram above as well).

adapter comms 2

As they say: ‘wait, there’s more…’

Now we get an adapter with optics and a controller [USPTO]


These patents will be keenly studied by third party adapter and lens makers – there’s additional interface electrical info as well [USPTO #1, #2, #3  ] + some more on the physical aspects of bayonet mounts [USPTO#1, #2]


What to make of all these patent applications? It seems that in the RF mount, a lot of thought has been given to what’s attached to it and how all these things can work together. The three adapters announced with the EOS R certainly suggests that Canon sees what goes between the lens and camera as potentially far more than a tube to hold the lens further away. Canon’s also paying a lot more attention to EF lens support than it did with the FD->EF change.

If you want more, then see numerous additional examples #1 #2 #3 #4 #5 #6 #7   #8 #9 #10 #11

Now there may be something fascinating in one of those, but with such a large number of very similar patents the willpower to read them in detail fails after a while ;-)

Just one more… multiple adapters [USPTO]

multi adapter


30th A Sigma Japanese patent application [HL] describes a 12mm f/2.8 full frame lens.

sigma 12/2.8

Some Canon designs for DO 300/2.8 and 400/2.8 lenses appear in a Japanese patent application [CN]

do 300/2.8

The mount is not mentioned in any way, but the back focus distance with such lenses means EF or RF would work. At a guess, we’ll see something like this when the EOS R range has its ‘1 series’ equivalent.

29th AF microadjustment is made a bit easier in a Canon US patent application [USPTO]

af adjustment

A focal reducer design (‘Speedbooster’) appears in a Japanese Canon patent application [CN]

Designed for adapting EF lenses to EF-M, with a shortening of focal length and increase in aperture it could just make EF-M a bit more attractive to those of us with collections of EF lenses.


22nd Holiday greetings to our US visitors ;-)

A Japanese Canon lens patent application [CN] shows a fish-eye design.

ef-m fisheye

The short back focus suggests EF-M or RF, but the APS-C sensor coverage leans towards EF-M.

At the moment there are no APS-C EOS R cameras, so unless Canon is proposing the bring out an RF-S mount in a few years it points to a potential expansion of EF-M – then again it is only a patent application…

21st The availability of RF only lenses with interesting specs/performance is something Canon have to play carefully in the EF->RF transition. Some interesting new RF designs and a suitably high end EOS R model will help.

There’s a real chance that the 16-35/2.8 equivalent in RF will go wider than 16mm [CR] which will be an interesting bit of design – 12-35/2.8 will definitely make use of the new mount’s lens design opportunities.

I do wonder how the previous FD->EF transition (1987) would have played out had it been subject to the gaze of the internet?

15th A set of Japanese Canon lens patent application are listed at [CN]

  • EF-M 32mm 1.4
  • Super Telephotos with built in teleconverters
  • Soft focus EF-S lenses (16-50/2.4 35-100/2.8

For the last one, the sheer complexity of the design suggests maybe a video lens?

soft focus

10th Tokina are saying that all their (current I assume) lenses work with the EOS R except for some issues wth the  exception of the :  Tokina AT-X 17-35 F4 PRO FX [Issue: the image Cropping/Aspect ratio would be fixed at “1.6x (Crop)” and cannot be set at “Full (3:2)”]  – expect a firmware fix in due course.

They also note “Furthermore, when using Tokina APS-C format lenses (Tokina DX lenses), in case the Cropping/Aspect ratio is set otherwise, it is necessary to reset it on “1.6x (Crop)” manually. When shooting with a different Cropping/Aspect ratio setting, vignetting is likely to occur”

8th Not noted because it is something new, but simply because it explains some of the workings of Canon’s latest TS-E lenses, a interesting US patent application shows how all the parts inside move [USPTO]


5th What lens next for the RF mount?
Plenty of suggestions abound, including a lightweight DO telephoto at [CR]

4th Sigma have announced firmware updates for the SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary for Canon and SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM

More details on the Sigma firmware page.

1st Time for some hefty RF mount (short back focus) full frame zooms in a US patent application [USPTO]

canon 14-21mm f1.5

Examples in the patents include:

  • 14-21mm F1.5
  • 16-30mm F2.8
  • 12-20mm F2

I suspect quite a bit of interest in these.


29th Info from Tamron about EOS R compatibility.

27th Sigma have announced lens compatibility info for the RF mount – via one of the adapters.

26th Venus lens have announced the Laowa 10-18mm f/4.5-5.6 FE Zoom lens  It includes front and rear filter options. Initially for FE mount, Z and RF mount options will follow- if you order soon the front 100mm filter option is free.

Magnetic Filter Holder

25th 2019 will be a year for RF lenses, not EF says Canon in a new interview from photokina [Main EOS R page]

“• The flange back of the lens is more important than the flange distance – what is important is to be able to put the back of the lens closer to the sensor for better optical performance.
• There is not a technical option to put an EOS-R on an EOS-M. The other way around is (maybe) possible but it will only be a macro lens according to Burnhill.
• Canon promised to release the “holy trinity” of lenses in 2019 (24-70mm, 70-200mm, 16-35mm).
• Canon will not introduce any new EF-mount lenses in 2019, but will focus all its efforts on RF lenses. New EF lenses will come later on (there are internal roadmaps for EF) but Canon knows it needs to catch up on its mirrorless lenses.”

The EOS-R is also confirmed as ‘not for the pro market’, so we can expect a lot more once a few higher end EOS R models start to appear.

23rd In the guessing game of ‘what next for the RF mount’ some more fast primes would seem a given, so we get a 24/1.2 and 85/1.2 suggested [CR]

18th A timely warning [PP] about how little rights you have when ‘investing’ money in Kickstarter projects, comes from the insolvency proceedings against the company behind the ‘Meyer Optik Görlitz‘ lens brand (and others) .

Whilst it’s often thought that sensor based AF removes the need for AF adjustment, some optical designs and aberrations can affect AF accuracy. A Canon patent application [USPTO] looks in depth at AF performance with sensor based detection and ways of removing AF error – The patent describes a device to measure potential errors and supply correction data.

Note – definitely a patent for those already understanding how AF works…
It adds to the information that a lens can supply a camera about how to best work with it.

16th It’s been a rumour staple for years and the EF24-70 F2.8 L IS gets another outing [CR] – but this time with the chance of an RF mount option too.

15th An interview with Sigma’s CEO at [DPR] gives a bit of insight into the development of the L mount and suggests L mount lenses mid next year. That will be L versions of existing Sony E mount, as well as new designs. Confidence in future Nikon Z and Canon RF compatibility is higher, with new lens firmware much easier to update.

Sigma interviews are always a little more open than the careful Canon/Nikon fare – would you get the head of Canon saying something along the lines of:

“I’ve been very impressed by Canon’s new lenses for RF. The 50mm F1.2 and 28-70mm F2. Very impressed – and a little jealous! They’re possible due to the wide diameter and short flange back. Otherwise such lenses would be very difficult or impossible. Having the larger elements at the rear of the optical system makes it easier to achieve good performance at large apertures.”

14th Some well made lens design observations by Thom Hogan [TH] point out that much of what you hear about lens mount ‘advantages’ is largely an invention of marketing departments or internet FUD from the rather large number of non lens designers out there ;-)

13th Lovers of big expensive manual focus glass can drool over some leaked pics of the upcoming Zeiss Otus 100mm f/1.4 [Nok]. Note the two versions with and without extension and aperture ring.

zeiss 100/1.4 with aperture ringzeiss 100/1.4

An APO Sonnar design due in 2019.

And still I wonder just what I’d want one for? When I want wide aperture I tend to want AF, since all my standard DSLR focus screens don’t do well at super wide apertures.  I just looked again at my thoughts on the value of  expensive 3rd party lenses from 2011 and am not minded to change my conclusions ;-)

11th A Canon US patent application [USPTO] discusses smaller high zoom ratio lenses for larger sensors

canon-zoom lens design

Sounds like lenses for RF, since the sensor size and short back focus wouldn’t do for EF (but there is a range of designs)

Designs include:

  • 24/3.5 – 360/5.6
  • 25/3.5 – 300/5.6
  • 30/2.8 – 350/4.5
  • 35/3.5 – 350/5.6
  • 35/4.5 – 390/5.6 (EF or RF)

6th A good interview at Photokina with the head of Sigma talking about the new ‘L-mount alliance’ [IR]

It includes some comments about the work needed for reverse engineering the RF and Z mounts.

4th Two very different designs using a DO element appear in a US patent application [USPTO].

do diffractive element

The first looks a fairly standard symmetrical lens design, whilst the second includes prisms, so could be for a telescope/bino

The patent is looking at the flat DO elements (10) rather than specific lens designs.

A US patent application [USPTO] looks at zoom lenses.

Multiple designs but two basic specs. The very short back focus and image size suggest EF-M rather than RF – could be a bridge camera too.

  • ~18-130 F3.6-5.9, APS-C EF-M?
  • ~18-190 F3.7-6.5, APS-C, EF-M?


A new AF motor design appeared in some RF lenses and it’s further detailed in two patent applications [USPTO #1 , #2]

motor design

3rd With recent updates (cutting a lot of weight) for the 400/2.8 and 600/4 it was a matter of time for when the 300/2.8 and 500/4 go the same treatment. Mid next year? [CR]

2nd Hong Kong lens company Meike have added a 6-11mm F3.5 zoom fisheye to their range – available in EF and F mount.

Samyang had a 10mm rectilinear full frame wide angle lens on show at Photokina. It’s not formally launched as far as I can see, so the only info I’ve seen are a few show photos [EPZ]

Having reviewed the XP14mm last year, I expect it will be of similar quality and hope to get to test it eventually.


29th If you’re curious about lens<->camera comms, then a new US patent application [USPTO] covers aspects of the communications protocol regarding power management. Yes, this is the sort of stuff people will be poring over to build adapters and third party lenses.

lens mount comms

Three US Patent applications cover new zoom lens designs


  • #1  17-70 F3.2-5.6 |16-60 F3.2-6  IS – back focus is OK for EF-S. Image height OK for FF
  • #2  17-70 F3.6-6.4 |16-60 F3.6-6.3 | 17-70 F3.6-5.8   – back focus is OK for EF-S. Image height OK for FF
  • #3  15-45 F3.5-6.4 | 18-55 F3.5-5.8 – back focus is OK for RF and EF-M. Image height OK APS-C

The third lens looks like an EF-M design, but it’s important to note that the first two are full frame (#1 has IS)

Could these be signs of some ‘cheaper’ RF mount zooms for a future lower end EOS-R?  Both could be EF-S (the back focus distance is too short for EF), but EF-S lenses are not usually designed to give full frame coverage.

A US  patent application [USPTO] looks at driving electrochromic (variable) filters [101] either in a camera body [103] or lens [102]EC filters


25th The site is up and promising info later today.

Leica to work with Sigma and Panasonic using the L mount:

L-Mount Alliance:

Strategic cooperation between Leica Camera, Panasonic and Sigma
One day before the official launch of photokina 2018, Leica Camera AG, Panasonic and Sigma announced a strategic partnership at the company’s press conference. The “L-Mount Alliance” is an unprecedented way of working together and will be particularly beneficial to the customers of the three companies. It allows Panasonic and Sigma to use the L-mount standard developed by Leica for their own developments and thus also offer cameras and optics with this lens mount. Through the joint efforts of the three partners, the alliance will significantly contribute to the importance of the L-Mount standard for the world of photography

Due to their numerous interchangeable components, system cameras allow a very flexible use and can be individually configured according to requirements. The bayonet is the most important interface, as the lens has a significant impact on the imaging performance and therefore on the final image quality. The strategic partnership between Leica, Panasonic and Sigma will allow customers to use a wider range of cameras and lenses in the future without compromising on so far to have to specify individual manufacturers, because they use propriety bayonets.

Dr. Andreas Kaufmann, Chairman of the Supervisory Board and majority shareholder, Leica Camera AG:

“Photographers are extremely important for their chosen camera system. Particularly in the increasingly growing market for mirrorless system cameras, there is an ever-increasing variety of different requirements on the part of the users. In order to be able to meet these requirements at short notice, we have decided to work together with renowned partners from the photographic industry.

With Panasonic we have many years of partnership and trusting cooperation and their expertise in electronics is undisputed. Sigma is also a respected company, which has established itself particularly in the field of optical development and with its innovative products, a perfect complement to our existing L-Mount portfolio can. We believe that together with our partners, we can achieve mutual and sustainable growth for all our products. “

Mr. Tetsuro Homma, Senior Managing Executive Officer, Panasonic Corporation, said:

“Panasonic’s focus has always been to revolutionize the camera market and make photographers’ lives easier, more advanced, and more enjoyable. Our long-standing partnership with Leica has resulted in numerous high-performance, high-end digital cameras, combining Leica’s leading optical technology with Panasonic’s digital technologies. This partnership has enabled us to drive the development of excellent digital photography products. The L-Mount alliance with Leica and Sigma is a prime example of the power of our collaboration. This alliance of strong companies will fundamentally change the future of the photography industry. As a market challenger, we have always driven innovation with the slogan ‘Changing Photography’ to meet the high expectations of professional photographers. Our
Partnering with Leica and Sigma will provide additional business opportunities for our companies, but above all, it will continue to bring great pleasure to our customers in photography. “

Mr.Kazuto Yamaki, Chief Executive Officer, SIGMACorporation:

“As cameras evolve toward digital and mirrorless, user and system requirements have also changed. Currently, there is an almost overwhelming choice of different systems that, however, do not yet meet all the needs of users, especially in terms of extensibility and flexibility. SIGMA joins this alliance to develop mirrorless cameras that benefit from the short run. As SIGMA seeks to develop high-quality and innovative high-performance products, this alliance will greatly enhance both the implementation and expandability of our camera system, significantly increasing the value to our customers. Leica is a great company and has had a significant impact on photography for more than 100 years, and Panasonic is a leader in many different areas because of its proven track record. Combined with SIGMA’s high quality, high performance and unique products, the L-Mount will become an extremely attractive system for potential users. “

About the L-mount

The L-Mount was developed by Leica Camera to provide customers with a future-proof, flexible, robust and precise bayonet that will meet even the most demanding photographic requirements. After its initial launch in 2014 in the Leica T, the L-Mount has been continuously developed by Leica Camera and its partners, resulting in improved and quasi-new L-Mount technology.

For the widest possible variety of products, the diameter of the L-mount was dimensioned at 51.6 millimeters, making it suitable not only for full-frame cameras but also for APS-C sensors. The small footprint of only 20 millimeters allows for a small distance between optics and sensor, making lenses much more compact – particularly useful for wide angle development. To withstand even the heaviest loads and to guarantee maximum safety for customers over many years of intensive use, camera bayonets become wear resistant Stainless steel and with four flange segments, which prevents tilting and ensures a particularly firm and flat fit of the lens. The standardized L-Mount contact strip ensures smooth communication between the electronic components in the lens and the camera, including the possibility of firmware updates for lenses, in order to react to technical developments and thus ensure full performance in the future.

Currently, the Leica SL system in full format and the APS system with camera models Leica CL, TL2 and TLde use the lens mount. All the optics of the different systems can be operated without restrictions and without adapters on all cameras – here is already one of the many advantages that customers have through the unified bayonet.In the near future, both the Leica CameraAG, as well as Panasonic and Sigma announce further products using the uniform standard.

24th Irix have announced a new 150mm f/2.8 1:1 macro lens

Irix-150mm-f2.8-MACRO-1to1-lens with hood

Panasonic would seem to be using a new mount for their full frame mirrorless. Full details should appear  tomorrow at a photokina press event. The mount is currently used on Leica SL, T and CL cameras.

From WPThe L-Mount has an inner diameter of 48.8mm and a flange depth of 20.0mm. The L-mount exists in two versions, an APS-C version (TL) and a full frame version (SL). The two versions are mechanically and electronically compatible.

A teaser image at (site now non accessible) shows a lens mount and lens back

L mount

New Sigma lenses [Nok]

28mm F1.4 DG HSM | Art

  • Lens construction: 12 groups 17 (including 2 FLD lenses and 3 SLD lenses)
Shortest shooting distance: 28 cm
  • Maximum magnification: 1: 5.4
Filter diameter: 77 mm
  • Size: φ 82.8 mm x 107.7 mm
Weight: To be determined
Mount: Sigma, Canon, Nikon, Sony E

40mm F1.4 DG HSM | Art

  • Lens construction: 12 groups 16 pieces (3 FLD lenses and 3 SLD lenses included)
  • Shortest shooting distance: 40 cm
  • Maximum shooting magnification: 1: 6.5
  • Filter diameter: 82 mm
  • Size: φ 87.8 mm x 131 mm
  • Weight: 1200 g
  • Mount: Sigma, Canon, Nikon, Sony E

56mm F1.4 DC DN | Contemporary

  • Lens construction: 6 groups 10 pieces (including one SLD lens)
Shortest shooting distance: 50 cm
  • Maximum shooting magnification: 1: 7.4
  • Filter diameter: 55 mm
Size: φ 66.5 mm x 59.5 mm
Weight: 280 g
Mount: Micro Four Thirds, Sony E

22nd An additional 8 new lenses from Laowa are to be shown at photokina (making 12 if you include ones recently shown in China)- see the Laowa release info

  • Laowa OOOM 25-100mm t/2.9 Cine Lightweight Zoom
  • Laowa 17mm f/1.8 MFT
  • Laowa 12mm f/1.8 MFT
  • Laowa 9mm f/2.8 Zero-D (DJI DL)
  • Laowa 9mm f/2.8 Zero-D MFT
  • Laowa 7.5mm t/2.1 Cine
  • Laowa 9mm t/2.9 Zero-D Cine
  • Laowa 12mm t/2.9 Zero-D Cine
  • Laowa 10-18mm f/4.5-5.6 FE Zoom
  • Laowa 100mm f/2.8 2X Ultra Macro APO
  • Laowa 17mm f/4 GFX Zero-D
  • Laowa 4mm f/2.8 Fisheye MFT Laowa

I’m currently testing the Laowa 24mm relay lens – any questions, please do ask?

laowa 24mm

18th New lenses on the way from Sigma [Nok]

  • Sigma 28mm f/1.4 DG HSM Art
  • Sigma 40mm f/1.4 DG HSM Art
  • Sigma 70-200mm f/2.8 DG OS HSM Sports
  • Sigma 60-600mm f/4.5-6.3 OS HSM Sports
  • Sigma 56mm f/1.4 DC DN (for mirrorless)

13th If you’re wondering how diffractive optics is doing, a new US Patent applications [USPTO] describes designs for lenses around the 600/4 size and looks at different uses of DO elements.

600 f4 diffractive optics lens

In particular the reduction of chromatic aberration is discussed and use of lighter lens elements.

Note – this design is not short back focus, so EF or RF

11th Should you buy new Nikon F and Canon EF lenses? A good question given the recent announcements. Thom Hogan has looked, and reasonably notes:

“…the answer, I think, is deceptively simple: concentrate on the known knowns. If you know you need/want a certain lens and you know that a mirrorless version is coming in a time period you can tolerate, then sure, wait. But if you’re trying to manage the known unknowns in your decision, I’d say you’re in analysis paralysis. Trying to guess what lens will come when at what price with what level of quality is a parlour game, not something you should be making decisions about. “ [TH]

It’s something I consider in ‘When do I move to EOS-R‘ and is similarly needs based for me. My own decision move will come when a new RF (only) lens offers a feature I seriously need for my work or an EOS R body with significantly improved usefulness for me arrives.

I’m curious to see what happens in what I’m now going to assume are next year’s 80D replacement and 7D mk2 replacement

At the moment I’m still putting my money on two EF-S mount DSLRs… with a side bet on one of them going to EOS R

Sigma lens firmware updates [via CR]

SIGMA 50-100mm F1.8 DC HSM | Art for SIGMA (v.1.01) and Canon

(v.2.01)This firmware corrects the phenomenon that the AF performance occasionally becomes unstable when used via SIGMA MOUNT CONVERTER MC-11.

SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for Canon (v.2.03)

This firmware improves the AF speed in certain combinations with some cameras.

SIGMA 150-600mm F5-6.3 DG OS HSM | Sports (v.2.00) / Contemporary for Canon (v.2.00)

This firmware allows compatibility with Canon’s in-camera Lens Aberration Correction function to enable correction matching the optical characteristics of each lens*. It also corrects the phenomenon that abnormal images appear or operation errors occur when the function is enabled. This firmware also improves the AF speed in certain combinations with some cameras.

* Compatible Canon camera models: EOS-1DX Mark II, EOS 5Ds, EOS 5DsR, EOS 5D Mark IV, EOS 6D mark II, EOS 80D, EOS 8000D (EOS Rebel T6s, EOS 760D), EOS 9000D (EOS 77D), EOS Kiss X8i (EOS Rebel T6i, EOS 750D), EOS Kiss X9i (EOS Rebel T7i, EOS 800D), EOS Kiss X9 (EOS Rebel SL2, EOS 200D)
For customers who own the SIGMA USB DOCK and applicable products, please update the firmware via SIGMA Optimization Pro.

10th In my look at the changes in the EF->RF mount transition I noted the lack of a clear EF-M -> EOS R migration path. Now, I don’t think this is quite the problem some claim, but it’s a fair concern. There’s also the question of moving ‘upwards’ from EF-S, where at least you’ll be able to use your favourite EF-S18-55 version on a crop sensor EOS R body (see the 80D replacement rumours page for more).

Anyway, there are mount longevity questions throughout the camera market and Thom Hogan has put together a good overview of potential changes [TH]

Comments about EOS R development – [Mynavi] suggest that IBIS nay be an option and include a lens roadmap.

“When installing the image stabilisation mechanism inside the body, you must overcome the challenges such as size, cost, heat generation. Regarding EOS R, after considering various things, it became such specification. Of course, it does not mean not to put the camera shake compensation mechanism inside the body. We will select and judge the nature of the camera.”

IS system for eos r

There are some interesting bits to note in the article, such as the choice of 54mm mount diameter and 20mm flange distance as a balance between size and future system design.

The RF lens roadmap suggests 6-7 RF lenses a year for a while, including large aperture f/2.8 zooms


6th RF lenses galore in a US patent application [USPTO] with the 24-105 F4 as 24-70 F2.8 (x2) and a 24-300  F4-5.6 IS

How about an RF24-300 F4-5.6L IS for the RF lens range?

rf24-300 F4-5.6

Here’s two possible RF versions of the 24-70 2.8L IS ?

rf24-70 version

rf24-70 2.8K IS


Note the huge rear elements – a feature made possible by the RF mount design.

A US patent application describes an ultrasonic lens motor and use in a lens [USPTO]


Very like what’s in the Canon EOS-R white paper.


2nd Several of the RF lenses have an extra ring at the front – this is a control ring and functions with the camera for fast settings control. One of the adapter devices also has it.

Basic Lens specs [Nok]

RF 28 – 70 mm F 2 L USM
  • Lens composition: 13 groups 19 sheets
  • Minimum shooting distance: 39 cm
  • Filter diameter: 95 mm
  • Size: 103.8 × 139.8 mm
  • Weight: 1430 g
RF 50 mm F 1.2 L USM
  • Lens construction: 9 groups of 15
  • Shortest shooting distance: 40 cm
  • Filter diameter: 77 mm
  • Size: 89.8 x 108.0 mm
  • Weight: 950 g
RF 35 mm F 1.8 Macro IS STM
  • Lens construction: 9 groups 9 pieces
  • Shortest shooting distance: 17 cm
  • Filter diameter: 52 mm
  • Size: 74.4 × 62.8 mm
  • Weight: 305 g
RF 24 – 105 mm F 4 L IS USM
  • Lens construction: 14 groups 18 pieces
  • Shortest shooting distance: 45 cm
  • Filter diameter: 77 mm
  • Size: 83.5 × 107.3 mm
  • Weight: 700 g

1st A few updated RF lens specs

Canon RF 35mm f/1.8 IS STM Macro

  • ~74mm × 62mm
  • Weight: ~306g

Canon RF 24-105mm f/4L IS USM

  • ~83mm x 107mm [EF 24-105mm f/4L IS II is 83mm  x 118mm]
  • Weight: ~698g [EF 24-105mm f/4L IS II is 795g]

Some pictures of Canon’s new RF lenses appear and some mount details – main info is on our EOS R page

  • 20mm flange distance
  • 54mm internal opening width
  • 12 pin control

By comparison the EF mount has a flange distance of 44mm and a similar  54mm internal size.

EOS R Lens mount

Three adapters are available.

mount adapters

Mount adapters:

  • “Mount adapter EF – EOS R”
  • “Control ring mount adapter EF – EOS R”
  • “Drop – in filter mount adapter EF – EOS R”

These could be interesting…

Four lens pictures have appeared as well

RF Lenses

canon RF 50 f1.2

RF 50mm F1.2L

canon rf 24-105 f/4

RF 24-105mm F4L

canon 28-70 f/2

RF 28-70mm F2L IS

canon RF 35mm Macro

RF 35mm F1,8 Macro IS STM



31st The Tamron 15-30 is officially announced – I’ve put all the info and specs on a Tamron 15-30mm  info page

The Canon mirrorless talk seems to have picked up strongly in advance of next week’s possible announcement

A suggested list of products [Nok]

  • EOS R body
  • EOS R 24105 kit
  • RF 35 mm F 1.8 M IS
  • RF 50 mm F 1.2 L USM
  • RF 28 – 70 mm F 2 L USM
  • RF 24 – 105 mm F4 L USM
  • EF-M 32 mm F 1.4 STM
  • EF 400 mm F 2.8 L III
  • EF 600 mm F4 L III
    * The lens name is not the official name, only the part that can be confirmed
  • M adapter R?
    Since only “M.ADAP R” “M.ADAP R ND” “M.ADAP R PL” is written in the simple order form, the official name is unknown
  • PD – E1 is also included in the accessory list (power supply)

30th Irix are trailing their appearance at Photokina, where their somewhat delayed square filter system will be on show – and ‘something else’. Currently they have lenses at 11mm and 15mm [my Irix 15mm review]

27th Tamron 15-30mm f/2.8 Di VC USD G2 details [Nok]

  • Construction: 13 groups 18 pieces
  • MFD: 0.28 m
  • Magnification: 1: 5
  • Size: 98.4 mm × 145 mm (Canon) · 142.5 mm (Nikon)
  • Weight: 1110 g (Canon) · 1100 g (Nikon)
  • Image stabilisation: 4.5 stops
  • Mount: Canon/Nikon
  • Uses newly developed AX (Anti-reflection eXpand) coating
  • Rear filter holder for Canon only
  • TAP in Console compatible
  • Overseas release date: September 21st (Nikon) · October 12th (Canon)

tamron 15 - 30

23rd A Canon US patent application [USPTO] describes ways of constructing diffractive optics lens elements that reduce the problems caused by light scatter at the step edges.


With the official launch of the Nikon Z series we get a lens roadmap


We get a development announcement for the 58/0.95

Development of the New NIKKOR Z 58mm f/0.95 S Noct Lens that Pursues Ultimate Optical Performance

The NIKKOR Z 58mm f/0.95 S Noct that Nikon is currently developing will be a large aperture, standard 58mm prime focal-length, the fastest lens in Nikon’s history3, manual-focus lens positioned at the very top of the S-Line. It will stand to symbolize the Nikon Z mount system’s new dimension in optical performance.

It has inherited the design concept behind the original AI Noct-NIKKOR 58mm f/1.2, a standard prime lens released in 1977, named for “Nocturne” (a musical composition inspired by or evocative of the night), and was popular for its ability to finely reproduce point light sources as point images. This new Noct lens that is currently in development will take advantage of the advanced design flexibility afforded by the Z mount, pursuing ultimate optical performance. Development continues with the goals of achieving an extremely fast maximum aperture of f/0.95, offering the ultimate in NIKKOR rendering performance with superior detail and sharpness. Additionally, the goal is to achieve beautiful blur characteristics, or bokeh, with good continuity, and ensure outstanding point-image reproduction capabilities for more compelling, three-dimensional imaging.

21st Two big Canon lenses should appear [CR] for Photokina

  • Canon EF 600mm f/4L IS III
  • Canon EF 400mm f/2.8L IS III

Zeiss is likely adding a 100mm f/1.4 Otus APO Sonnar T* to their line-up [Nok]

14th Maybe you’ve seen ads and info about a variety of German sounding, German made lenses – often being funded by Kickstarter funding?


An interesting article at [PR] looks into the potential collapse of the group behind those reassuringly retro brands.

The MOG site is still up with no sign of anything amiss.

6th The Tamron 17-35  is announced – I’ve put all the press info and full specs in a short news article

An excellent stripdown of the new Canon 70-200mm f/4L IS II [LR] shows an awful lot of the hidden engineering and manufacturing engineering that Canon are putting into their new lenses.

3rd A new Tamron lens is on its way [Nok] 17 – 35 mm F / 2.8 – 4 Di OSD (Model A 037)

  • Mount:  Canon ·  Nikon
  • Lens construction: 10 groups of 15 elements
  • Min. Focus: 0.28 m
  • Maximum magnification: 1: 4.9
  • Filter diameter: 77 mm
  • Size: 83.6 mm × 92.5 mm (Canon)
  • Weight: 460 g

Tamron_17-35_lens-construction17-35 A037

2nd Nikon continue their mirrorless trail with a short video showing the new mount – this frame is all you really need to see [Nikon mirrorless page].

Nikon’s F mount was an obvious candidate for complete replacement since it was always a compromise for modern lens designs. Canon has a trickier job, since the EF mount made a big break with the past (FD) in the 1980’s


1st I still use my original EF70-200 F2.8L IS – get an idea of what it does with a 5Ds in a collection of aerial photos of my home city of Leicester. Taken on a recent helicopter trip, with the doors taken off ;-)

You can even see the car park where King Richard III was discovered, and the nearby cathedral where his remains were re-interred.

Full details about the Laowa 24mm relay lens

Here’s the optical design – that’s a lot of elements (click to enlarge)



28th Laowa are going to be launching a kickstarter campaign in August for the rather unusual 25mm macro relay lens I first tried out last year. I’m waiting for more details and have an information page for the lens.

Laowa 25mm f14 specifications

I hope to have a full review in due course…

24th Irix have announced Adobe CC profile support for the 11mm F4 and 15mm F2.4 lenses:

“We would like to remind all current and future users of Irix lenses that as from June 19, the Adobe CC package is now officially supported for Irix 11mm f / 4.0 and Irix 15mm f / 2.4 lenses (from ACR 10.4) which allows automatic correction of distortion and chromatic aberration. As one of the few manual lenses available on the market, Irix lenses are equipped with an electronic AE system which not only allows the user to control the aperture from the camera, but also to record information on exposure parameters in EXIF format, the effect of which is the possibility of continuous software development of our lenses. We believe that photography should be a harmonious process, not a struggle.
Users of previous versions of Adobe software can still download the appropriate correction profiles from (”

19th After recent testing/reviews, I’ve written an article about all the different ways I use lens shift and why I use them.

15th Two long white lenses [CR] are expected before Photkina. Given a prototype Canon EF 600mm f/4 DO BR was shown last September at the Canon expo, it might be one of them.

Canon 600-F4-DO

There have been quite a few patents for long lenses, but the 2009 EF800 F5.6L IS is a relatively old design (2008)

13th Sigma Art lens firmware updates [details]

11th Canon are expected to make some pre-photokina announcements in the first week of September and it’s likely we’ll see some lenses, both for existing models and likely for any new mirrorless FF camera(s)

At last, I’ve completed my full set of Canon TS-E lens reviews with a detailed one for the TS-E24mm F3.5L II

Whilst I’d written up some note when I got it in 2009 I’d never produced a detailed review like I had for the new (2017) TS-E lenses. As with the others, it concentrates a lot on how and why you’d use it, as well as looking at its performance.

focal plane

6th Not something that’s going to replace your ‘L’ glass in a hurry, but flat optics continue advancing [via ISW]

5th In my latest TS-E lens test I’ve written up a detailed TS-E17mm F4L review.

A lens I use a great deal, but I’d never updated my notes to a ‘full review’ like the ones for the new TS-E lenses

17mm at full left-tilt

3rd It’s been a slow lens year so far (see the list down the page for the entire EF lens history), but info from certification agencies suggests 5 upcoming  Canon lenses [Nok] There are only code numbers to go by though.

  • 2439C005AA
  • 2959C005AA
  • 2963C005AA
  • 2972C005AA
  • 3045C005AA

Suggestions abound as to what they are, with an EF-M prime (32mm/1.4?) a new kit lens (or two) and two ‘pro’ lenses making the running.

Of course, if the FF Canon mirrorless makes any mount change, we’ll need some lenses for it. My personal feeling is that Canon won’t go for a new mount option, but I’ve nothing more concrete to base that on other than the large collection of EF lenses sitting near my desk ;-)


28th A set of Canon lens designs [USPTO] for macro (1:2) use.

50mm macro

All around 50mm f2.8 (f/4 at 0.5x) BF~55mm, image height= ~34mm

Note the long back focus and image height – these are MF lenses – or in the right mount a TS-E design – in fact, if you look at the TS-E50 internal design [TS-E 50mm review) it seems just that…

A zoom lens design from a Canon patent application [USPTO] has two aperture stops.

The aim is to produce a zoom lens with constant minimum f number, but having small variations in lens aberrations when focusing near/far. The second aperture stop is varied as the lens zooms and focuses.


The second aperture doesn’t change much.

variable aperture

Example lens data in the patents are:

  • 16-35mm f/2.8 full frame EF
  • 24-70mm f/2.8 full frame EF

The secondary aperture mechanism.


Two new EF lenses?

27th A new 50mm is probably being tested by Canon – that’s about it [CR]

Perhaps time for my 1993 EF 50mm F1.4 USM to be updated?

26th Some news about a 1991 Canon lens…

Canon UK lent me the TS-E45mm to complete my look at all the lenses – I’ve written a full TS-E45 review in the same style as those for the 50/90/135 TS-E lenses. You’ll find them used at a small fraction of what the TS-E50 costs – is it worth getting one? I’ll have a similarly updated (even longer) review of the TS-E17 soon.

24th An interesting suggestion [CN] that we may be seeing seeing focal reducers for EF-M before long. For some this is a way of reducing depth of field, but my interest would be the wider angle it gives.

22nd A range of lens designs appear from Canon in a patent application [USPTO] With different controls for focus of internal lens groups they offer ‘Soft Focus’ features.

soft focus design

The design above is for a full frame (mirrorless) 70-200 f/4.

Other designs would fit EF mount 35/1.8 | 58/1.4 | 105/2

19th  A Japanese Canon patent [CR] shows an 18-55 variant with an LCD display
– certainly time for yet another 18-55 ( 18-55  compendium)

patent for 18-55is

15th Samyang are going to announce an AF 85 1.4 for Canon EF [CR]

Several new Canon lenses seen in regulatory filings [Nok]

Looks as if we have four more new lenses on the way this year.  A new 24-70 has been suggested, and it must be time for yet another 18-55

14th Several (kit) zoom designs in a Canon US patent application [USPTO]

They all seem to be variations of 18-55mm ~f4-5.6 APS-C designs – some would be EF-S and others EF-M (differing back-focus distances).

zoom lens design

Graduated filter elements for things such as apodisation appear in a US Patent Application [USPTO]

grad filter

Some firmware updates for the Sigma mount converter MC-11 (EF on Sony E) and EF-630 flash [CR]

12th After new 70-200 lenses, are we going to see a new version of the 24-70 2.8L?  – It’s speculation time, although I note from the lens timeline on I’ve reproduced below, that we’re currently at a low level of announcements so far for the year (2).

Year M Lens Year M Lens Year M Lens
1987 3 EF50mm f/1.8 1988 6 EF28-70mm f/3.5-4.5 II 1989 4 EF28-80mm f/2.8-4L USM
1987 3 EF35-70mm f/3.5-4.5 1988 6 EF35-135mm f/3.5-4.5 1989 9 EF50mm f/1.0L USM
1987 3 EF35-105mm f/3.5-4.5 1988 6 EF50-200mm f/3.5-4.5L 1989 9 EF85mm f/1.2L USM
1987 3 EF100-300mm f/5.6 1988 10 EF35-70mm f/3.5-4.5A 1989 9 EF80-200mm f/2.8L
1987 4 EF15mm f/2.8 Fisheye 1988 11 EF24mm f/2.8 1989 10 EF20-35mm f/2.8L
1987 4 EF28mm f/2.8 1988 11 EF200mm f/1.8L USM
1987 5 EF70-210mm f/4 1988 11 EF600mm f/4L USM
1987 6 EF100-300mm f/5.6L 1988 12 EF100-200mm f/4.5A
1987 10 EF135mm f/2.8 Soft Focus
1987 11 EF300mm f/2.8L USM
1987 11 EF28-70mm f/3.5-4.5
1987 12 EF50mm f/2.5 Compact Macro
1987 12 EF50-200mm f/3.5-4.5
1990 3 EF35-135mm f/4-5.6 USM 1991 3 EF75-300mm f/4-5.6 1992 3 EF500mm f/4.5L USM
1990 4 EF100mm f/2.8 Macro 1991 4 EF 400mm f/2.8L USM 1992 4 EF35-80mm f/4-5.6 USM
1990 6 EF70-210mm f/3.5-4.5 USM 1991 4 TS-E24mm f/3.5L 1992 6 EF20mm f/2.8 USM
1990 6 EF100-300mm f/4.5-5.6 USM 1991 4 TS-E45mm f/2.8 1992 6 EF85mm f/1.8 USM
1990 9 EF35-80mm f/4-5.6 1991 4 TS-E90mm f/2.8 1992 6 EF35-105mm f/4.5-5.6 USM
1990 10 EF35mm f/2 1991 4 EF35-105mm f/4.5-5.6 1992 6 EF75-300mm f/4-5.6 USM
1990 11 EF80-200mm f/4.5-5.6 1991 10 EF100mm f/2 USM 1992 6 EF80-200mm f/4.5-5.6 USM
1990 12 EF50mm f/1.8 II 1991 10 EF28-80mm f/3.5-5.6 USM 1992 11 EF28-105mm f/3.5-4.5 USM
1991 12 EF14mm f/2.8L USM
1991 12 EF200mm f/2.8L USM
1991 12 EF300mm f/4L USM
1993 1 EF35-350mm f/3.5-5.6L USM 1994 No lenses in 1994? 1995 2 EF38-76mm f/4.5-5.6
1993 3 EF20-35mm f/3.5-4.5 USM 1995 3 EF35-80mm f/4-5.6 III
1993 5 EF400mm f/5.6L USM 1995 3 EF70-200mm f/2.8L USM
1993 6 EF50mm f/1.4 USM 1995 3 EF75-300mm f/4-5.6 II USM
1993 7 EF1200mm f/5.6L USM 1995 3 EF80-200mm f/4.5-5.6 II
1993 9 EF35-80mm F4-5.6 II 1995 7 EF75-300mm f/4-5.6 II
1993 10 EF28-80mm f/3.5-5.6 II USM 1995 8 EF28-80mm f/3.5-5.6 III USM
1993 11 EF28-70mm f/2.8L USM 1995 9 EF28mm f/1.8 USM
1995 9 EF75-300mm f/4-5.6 IS USM
1996 3 EF200mm f/2.8L II USM 1997 3 EF300mm f/4L IS USM 1998 2 EF28-135mm f/3.5-5.6 IS USM
1996 3 EF400mm f/2.8L II USM 1997 12 EF24mm f/1.4L USM 1998 3 EF22-55mm f/4-5.6 USM
1996 4 EF135mm f/2L USM 1998 3 EF55-200mm f/4.5-5.6 USM
1996 4 EF180mm f/3.5L Macro USM 1998 11 EF100-400mm f/4.5-5.6L IS USM
1996 4 EF17-35mm f/2.8L USM 1998 12 EF35mm f/1.4L USM
1996 9 EF24-85mm f/3.5-4.5 USM
1996 9 EF28-80mm f/3.5-5.6
1996 9 EF28-80mm f/3.5-5.6 IV USM
1999 4 EF28-80mm f/3.5-5.6 II 2000 3 EF100mm f/2.8 Macro USM 2001 9 EF70-200mm f/2.8L IS USM
1999 4 EF28-80mm f/3.5-5.6 V USM 2000 9 EF28-200mm f/3.5-5.6 2001 12 EF400mm f/4 DO IS USM
1999 4 EF75-300mm f/4-5.6 III 2000 9 EF28-200mm f/3.5-5.6 USM 2001 12 EF16-35mm f/2.8L USM
1999 4 EF75-300mm f/4-5.6 III USM 2000 10 EF28-90mm f/4-5.6
1999 7 EF300mm f/2.8L IS USM 2000 10 EF28-90mm f/4-5.6 USM
1999 7 EF500mm f/4L IS USM 2000 10 EF28-105mm f/3.5-4.5 II USM
1999 9 EF400mm f/2.8L IS USM
1999 9 EF600mm f/4L IS USM
1999 9 MP-E65mm f/2.8 Macro
1999 9 EF70-200mm f/4L USM
2002 9 EF28-90mm f/4-5.6 II USM 2003 5 EF17-40mm f/4L USM 2004 6 EF28-300mm f/3.5-5.6L IS USM
2002 9 EF28-105mm f/3.5-4.5 II USM 2003 9 EF28-90mm f/4-5.6 II 2004 6 EF70-300mm f/4.5-5.6 DO IS USM
2002 9 EF28-105mm f/4-5.6 USM 2003 9 EF55-200mm f/4.5-5.6 II USM 2004 9 EF-S 17-85mm f/4-5.6 IS USM
2002 9 EF90-300mm f/4.5-5.6 USM 2003 9 EF90-300mm f/4.5-5.6 2004 9 EF28-90mm f/4-5.6 III
2002 11 EF24-70mm f/2.8L USM 2004 9 EF-S 18-55mm f/3.5-5.6 2004 11 EF-S 10-22mm f/3.5-4.5 USM
2004 9 EF-S 18-55mm f/3.5-5.6 USM  
2005 3 EF-S 60mm f/2.8 Macro USM 2006 2 EF-S 17-55mm f/2.8 IS USM 2007 2 EF16-35mm f/2.8L II USM
2005 3 EF-S 18-55mm f/3.5-5.6 II 2006 2 EF85mm f/1.2L II USM 2007 8 EF-S 18-55mm f/3.5-5.6 IS
2005 3 EF-S 18-55mm f/3.5-5.6 II USM 2006 8 EF70-200mm f/4L IS USM 2007 8 EF-S 55-250mm f/4-5.6 IS
2005 9 EF24-105mm f/4L IS USM 2006 8 EF50mm f/1.2L USM 2007 8 EF14mm f/2.8L II USM
2005 9 EF70-300mm f/4-5.6 IS USM
2008 2 EF200mm f/2L IS USM 2009 2 TS-E 17mm f4/L 2010 1 EF70-200mm f/2.8L IS II USM
2008 2 EF800mm f/5.6L IS USM 2009 2 TS-E 24mm f3.5L II 2010 8 EF70-300mm f/4-5.6L IS USM
2008 9 EF24mm f/1.4L II USM 2009 9 EF-S 18-135mm f/3.5-5.6 IS 2010 8 EF 8-15mm f/4 L USM fisheye
2008 9 EF-S 18-200mm f3.5-5.6 IS 2009 9 EF-S 15-85mm f/3.5-5.6 IS USM 2010 8 EF300mm f/2.8 L IS II USM
2009 9 EF 100mm f/2.8L Macro IS USM 2010 8 EF400mm f/2.8L IS II USM
2011 2 EF500mm F/4L IS II USM 2012 2 EF 24-70mm f/2.8L II USM 2013 3 EF-S 18-55mm f/3.5-5.6 IS STM
2011 2 EF600mm F/4L IS II USM 2012 2 EF24mm f/2.8 IS USM 2013 5 EF200-400mm f/4L IS USM 1.4x
2011 2 EF-S 18-55mm f/3.5-5.6 III 2012 2 EF28mm f/2.8 IS USM 2013 6 EF-M 11-22mm f/4-5.6 IS STM
2011 3 EF-S 18-55mm f/3.5-5.6 IS II 2012 6 EF40mm f/2.8 STM 2013 8 EF-S 55-250mm f/4-5.6 IS STM
2011 6 EF-S 55-250mm f/4-5.6 IS II 2012 6 EF-S 18-135mm f/3.5-5.6 IS STM
2012 7 EF-M 18-55mm f/3.5-5.6 IS STM
2012 7 EF-M 22mm f/2 STM
2012 11 EF 24-70mm f/4L IS USM
2012 11 EF 35mm f/2 IS USM
2014 5 EF16-35mm f/4L IS USM 2015 2 EF11-24mm f/4L USM  2016 2 EF-S 18-135mm f/3.5-5.6 IS USM
2014 5 EF-S 10-18 f/4.5-5.6 IS STM 2015 5 EF50mm f/1.8 STM  2016 5 EF-M 28mm f/3.5 Macro IS STM
2014 6 EF-M 55-200mm f/4.5-6.3 IS STM 2015 8  EF35mm f/1.4L II USM 2016 8 EF16-35mm f/2.8L III USM 
2014 9 EF400mm f/4 DO IS II USM 2015 10 EF-M 15-45mm f/3.5-6.3 IS STM 2016 8 EF24-105mm f/4L II USM 
2014 9 EF24-105mm f/3.5-5.6 IS STM 2016 9 EF70-300mm f/4-5.6 IS II USM 
2014 9 EF-S 24mm f/2.8 STM 2016 9 EF-M 18-150mm f/3.5-6.3 IS STM
2014 11 EF100-400 f/4.5-5.6L IS II USM
2017 2 EF-S 18-55mm f/4-5.6 IS USM  2018  6  EF 70-200 f/2.8L IS III
2017 4 EF-S 35mm f/2.8 Macro IS STM  2018  6  EF 70-200 f/4L IS II
2017 8 TS-E 50mm f2.8L Macro
2017 8 TS-E 90mm f2.8L Macro
2017 8 TS-E 135mm f/4L Macro
2017 8 EF 85mm f/1.4 L IS USM

Active links go to that lens’s information page on for review links for all Canon EF lenses

Note that discontinued lenses may still be available and current listed lens may be in the process of being discontinued. There is often no clear termination process, particularly with Canon’s global market.

8th A Japanese patent application from Canon, for an 800mm F5.6, with a DO element [CN]

800mm f/5.6 DO

7th As widely trailed, two new Canon 70-200 ‘L’ lenses are announced.

Full specs and info in the Updated Canon 70-200 F2.8 and F4 news article (updated as we find new info).

5th The new 70-200 F2.8L IS III is sighted [Nok]

canon 70-200 2.8L IS mk3

Following on from my TS-E50mm F2.8L Macro review. I’ve borrowed a TS-E45mm F2.8 – the only one of the original 1991 TS-E lenses I’ve never tested. Still a very good lens – time to see just how good, on the 5Ds.

Canon ts-e45 on 5Ds

1st A Japanese patent application [CN] looks at lens communications, but also shows a different type of mount design. Whilst the majority of the patent is about lens <-> camera communications (as with this US patent from 26th April below) it’n not specifically mentioning EF/S/M


31st The two new white lenses from Canon seem pretty certain for next week [CR]

  • Canon EF 70-200mm f/4L IS III
  • Canon EF 70-200mm f/2.8L IS II

A Canon patent application [USPTO] looks at antireflection coatings, such as ‘Airsphere’ and anti contamination measures (it can be an oily environment inside a lens – parts don’t lubricate themselves).


If you’re curious about anti-reflection lens coatings, there is more at [USPTO]

My TS-E90mm F2.8L Macro review is done…

mount movements

24th I’m working on my TS-E90mm F2.8L Macro review and was lucky enough to get the Benro GD3WH geared head to test at the same time. I’ve just written up a review. It made the TS-E lens so much easier to level and set up. Definitely one for my Christmas list…

Diffractive optics make a show in a new US patent application [USPTO]

Canon DO lens

Examples shown are all around 800/5.6

Various aspects of moulding and curing the parts of a DO lens element appear in a new patent application [USPTO

do lens element

18th A Canon Japanese patent filing shows a short back focus 16-28mm f/2.8 zoom.

It’s a full frame mirrorless design – not for EF mount.

16-28 f2.8

Zoom ratio 1.67
Focal length 16.48 – 27.44 mm
F number 2.88
Half angle 52.70 – 38.25
Image height 21.64 mm
Back focus 12.33 – 10.00 mm

The size of the rear element also makes me wonder if it’s too large for EF-M? There’s been an ongoing debate about what lens design limitations you’d get with a full frame sensor behind the EF-M mount. My suspicion is that if you eventually want to make top-end mirrorless cameras with lenses better than the current best EF models you need a wider opening than EF-M provides.  Having used Karen’s little 100D for some shots for a review the other day, I’m not convinced by those that say that the EF mount makes the camera too deep. If I want a small camera I’ll buy a small camera – if I want a pro level camera I want something with 1 series heft -and- ergonomics. Each time I pick up one of the Sony mirrorless cameras I still find them a tad too small for comfort.
That said… Sony, if you still want to convince me otherwise, you do know our address ;-)

via HL

17th More about electrochromic filter elements, both within a lens or a camera body, in a Canon US patent applications [USPTO] – more about the practicalities of driving them than any specific new use.

15th The likelihood of new ‘L’ Canon EF70-200 lenses (F4 and F2.8) is raised to ‘very likely +’  at CR

BTW, after years of ‘not quite getting round to it’ we’re setting up a newsletter for the articles/news/reviews on the site. It should be no more than 2-3 times a month, and for rumour fans will have a brief note about any significant stuff we hear. That said it’s mainly about my more serious (useful!) stuff on the site. It will not be ‘yet another list of deals’ – Newsletter signup

14th Another Yongnuo EF mount AF lens has appeared [YN]

This time a new version of the 50mm, the YN50mm F1.8 II

YN 50mmF1.8 mkII specs

The MTF chart promises ‘interesting’ wide open performance with those lumps and bumps.

YN 50 1.8e mtf

12th The Sigma 70mm F2.8 DG Macro Art lens [info] will be available in Canon mount at the end of May for $569 in the US  [B&H]

10th Three Nikon designs for wide angle lenses (~20mm f/2) for curved full frame sensors [HL]

nikon lens for curved sensor

Fixing plastic (resin) lens elements into lenses without introducing mechanical stress is covered in a US patent application [USPTO].

I’m not aware of any plastic elements in EF lenses at the moment (apart from DO elements sandwiched between glass).

canon zoom lens design

A Canon zoom lens patent application [USPTO] covers a number of higher resolution designs for small sensor cameras (sub APS-C)

Likely 4k camcorders and their ilk.

A firmware update for the EF 200-400mm f/4L IS 1.4x [Canon]

Firmware Version 1.1.0 is incorporated with the following correction.

  • Corrects a phenomenon in which the subject may not be in focus on some occasions when using this lens with some camera models (*) and performing AF shooting from approximately 3m.
    * Some camera models: EOS-1D X, Mark II, EOS-1D X, EOS-1D C, EOS 5Ds, EOS 5Ds R, EOS 5D Mark IV, EOS 5D Mark III

9th Yongnuo have announced a new 60mm f/2 manual focus macro lens for EF mount.  With a max 1x magnification it features electronic aperture.

Full details for: Yuongnuo 60mm F2 Macro

7th Canon Europe have published an interesting article about how they make lenses.

As well as the TS-E90mm from Canon, Benro have sent me a GD3WH geared tripod head for a review. My first tests with my TS-E17 in the TSE-Frame show how easy it is to set up accurately.

ts-e17 on GD3WH geared Benro head

5th Yay, the Canon TS-E90mm F2.8L Macro has turned up. I’ll be looking to finish my reviews of all three new TS-E lenses.

Unlike the 50mm and 135mm I already have a TS-E90mm F2.8 to compare it with…

TS-E90mm old and new

The new one feels a lot heavier…

3rd A Canon patent application [USPTO] shows ongoing development work in DO elements for lenses.

Of particular importance is the angle at which ‘steps’ in the DO element are cut – this affects flare and other undesirable aspects of DO designs.

DO element surface angles

Several example designs are included from a long ~800/5.6


to a wider 200/2

wider DO lens

Of course, these are just examples using the DO element, but may yet point to something interesting.


26th Two lenses appear in certification notes [Nok]

  • Interchangeable lens 1 | SKU: 2309C005AA | Made in Japan
  • Interchangeable lens 2 | SKU: 2439C005AA

I’ve just published a short interview with Venus Optics (Laowa), from when they were at the UK Photography Show recently. Here’s their chief lens designer.

Mr. Dayong Li of Venus Optics

Mr. Dayong Li of Venus Optics

A Canon US patent application [USPTO] for those of you interested in lens<->body communications protocols.

This one looks at changing the number of data words communicated in messages. This matters because in rapid shooting and live-view, the existing data exchange protocols take too long. It also lets a lens communicate a large amount of data to a body quickly when first attached. An example of this would be custom lens aberration and calibration data, related to the actual lens you are using.

This looks like part of Canon’s ongoing updating/expansion of the capabilities of the EF lens system, whilst retaining backwards capability. It looks as if my excellent 1987 EF15mm F2.8 fisheye should work for many years to come ;-)

If you’re curious, I keep my EF lens mount info/data on a page on the site [EF lens mount information]

20th Laowa have announced four new lenses for a variety of mounts.

A Canon patent application [mirrorless page] looks at a new mount adapter design that can be swapped out for different lens mounts.

19th Meike have announced an 85/1.8  AF lens in EF mount – no other info as yet [epz]

Meike 85/1.8

17th Diffractive optics is still going strong – this time with A 600/5.6 PF due ‘soon’ from Nikon [NR]


Nikon 600mm f5.6 lens patent

SIGMA Factory Tour  [Cinema5D]

11th Mention of a new TS-E17 for next year [CR]

In terms of TS-E lens design I’ve noted the latest set being referred to as ‘third generation’ ones – I asked about updating the ‘2nd gen’ ones and only got a broad smile…

6th Whilst Tamron goes for spikes, a Japanese Canon patent application [CN] goes for a smoother curved aperture.

aperture ring

5th A Japanese patent from Tamron [HL] has a star shaped aperture to improve high frequency MTF

star aperture

That and it will give nice 10 pointed stars to point light sources… interesting to see if this actually appears and how it works in practice.

A slew of patent applications [USPTO] for making use of new glasses, such as this one for a 14mm/2.814mm f/2.8 example

The patent includes several 14/2.8 examples and an 11-24/4 design – all EF full frame

A patent application for several teleconverter designs [USPTO] 1.4x/1.8x/2x

2x TC example

All follow the theme of using new glasses to reduce aberrations.

The use of glass with high dispersion and negative anomalous dispersion is discussed, along with a number of long lens designs (inc 400/2.8 and 70-200/2.8) in a US patent application [USPTO]

400/2.8 example70-200 f/2.8 example

A US Canon patent application looks at improved control of chromatic aberration and field curvature. It includes 24/1.4, 35/1.4, 50/1.2 [shown below], 85/1.4 examples. [USPTO] – all FF EF mount designs.

50mm example

1st A Japanese Canon patent [CN] shows 135/2 | 185/3.5 | 400/2.8 designs with apodisation filters (11 in the diagram)

apod 135-400


28th To go with the new C700FF camera, Canon have announced a 20mm T1.5 video prime lens

canon 20mm T1.5

MELVILLE, N.Y., March 28, 2018 – Canon U.S.A. Inc., a leader in digital imaging solutions, today announced the launch of a new addition to the Cinema EOS System: the CN-E20mm T1.5 L F lens – a full-manual 20mm Cinema Prime Lens for EF Mount cameras. A popular focal length, the 20mm lens delivers exceptional optical performance in a compact form factor. With the introduction of this new lens, Canon further enhances its EF Cinema Lens family to meet a diverse range of cinematic and video-production needs, further contributing to the world of cinematography.
“As Canon continues to expand its reach in the cinema space, we are thrilled to introduce the CN-E20mm T1.5 L F lens, further expanding a robust line up of Cinema Prime lenses,” said Yuichi Ishizuka, president and COO, Canon U.S.A., Inc. “This new lens will provide users with an option in-between our 14mm and 24mm lenses, giving greater flexibility for their scene framing. Canon is excited to see the projects our users create with this lens and Canon Cinema cameras.”

The new CN-E20mm T1.5 L F lens can provide 4K resolution from the center of the images to the periphery, providing high image quality for Canon cameras that feature full-frame sensors such as the new EOS C700 FF digital cinema camera. In addition, the 11-blade aperture diaphragm alongside a T number1 of 1.5 allows the lens to provide beautifully soft bokeh. Like all Canon Cinema Prime lenses, the CN-E20mm T1.5 L F lens features warm, natural-looking tones, 300 degrees of focus ring rotation, and minimized focus breathing.

Since the launch of the Cinema EOS System and EF Cinema Lenses in November 2011, Canon has greatly expanded the EF Cinema Lens offerings. The lineup—which includes the Prime, Zoom, Compact Zoom, CINE-SERVO and COMPACT-SERVO series of lenses—has become very popular for a wide range of users. With the introduction of the CN-E20mm T1.5 L F lens, the lineup now boasts a total of 21 lens models. This expansive line of lenses provides cinematographers with even more options to choose from, which can support enhanced content creation for a variety of uses and shooting scenarios.

The CN-E20mm T1.5 L F lens is scheduled to begin shipping in fall 2018. For more information please visit

27th I’ve just published a detailed review of the Canon TS-E50mm F2.8L Macro lens, with an emphasis on what you can do with the lens (and how, and why)

50mm on 5Ds tilt and shift

A CP+ interview at DPR describes some of Tamron’s thoughts on their lens range.

An observation that may be of interest is that their Sony experience makes it relatively easy for them to provide lenses for possible upcoming Canon/Nikon models. Does this suggest that they think Canon will throw the EF mount under the bus for FF mirrorless? OK not quite the disruption of the FD->EF change, but something that would need care.

25th Interesting article about the development of the EF85 F1.4L IS [Canon]. The advances in lens technology are notable.

“…It’s easy to overlook the importance of glass technologies, materials and advances. Indeed, as Iwamoto explains, more than half of the glass elements in the EF 85mm f/1.4L IS USM are made of materials that were not yet put into practical application when the EF 85mm f/1.2L II USM was released in March 2006.
Correction for axial chromatic aberration (colour fringing in defocused areas) is important in any lens designed for use at wide apertures, and Canon’s design team had the answer.
“To correct axial chromatic aberration, we placed glass with anomalous dispersion in front of or near the diaphragm. In addition, we used high refractive index glass for the positive lens, which is essential to improve image plane characteristics. In this lens, axial chromatic aberration and image plane characteristics are favourably corrected through the optimal arrangement of glass, having both high refractive index and anomalous dispersion characteristics….”

By using new glass materials and aspherical lenses that did not exist at the time the EF 85mm f/1.2L II USM was developed, the design team was able to correct each type of aberration and reduce the size of the lens at the same time.”

22nd The Laowa 9mm f/2.8 Zero-D wide angle is announced for mirrorless (EF-M,Sony E, Fuji).

21st The new Canon 70-200 F4L IS II is due in April [CR]

20th You may have noticed the optical design diagrams I often include from patents. Well it appears that a lot of patents have more than enough detail to set up an optical bench model. Bill Claff of the Photons to Photos site has set up an interactive optical bench which includes quite a few designs, including recently a couple of canon examples, such as this for the EF-S 18-200mm f/3.5-5.6 IS

19th An interesting interview [DPR] with the Sigma CEO shows some real desire to produce even more great lenses.

I was interested in his suggestion that given the choice, his aim was for optical quality over lightness – one of the more open and informative camera industry CEOs

15th DO lens elementA Canon US patent application looks at aspects of making the moulded elements for diffractive optics (DO) elements.


Looks as if we’ll see a EF 70-200mm f/4L IS II and EF-M 32mm f/1.4 STM appear sometime this year [Nok]

The 70-200/4 is quite a good lens so it will be interesting to see how a new design improves it – the 32mm give a ~51mm equivalent FOV, making for a nice ‘standard lens’

I’ve been out trying out the TS-E50. Full tilt at f/2.8 – De Montfort university campus near my home. [click to enlarge]

DMU model campus

Although not a fan of ‘small world’ or ’tilt-shift effect’ images, I definitely had to try it with the TS-E50.

13th Canon have sent me the TS-E5omm F2.8L Macro lens to have a go with – I’m hoping to add a TS-E50mm review to go with my TS-E135 review in a few weeks.

TS-E 50mm on 5Ds

12th A suggestion that development of Canon’s 24-70 2.8L IS is ongoing [CR] but not a lens for this year.

After the big trade shows a series of ‘interviews’ tend to emerge, helping fill the slack for photo news sites.  These range from the bland/anodyne to genuinely interesting.

Sigma’s CEO is one of the more forthcoming – The article at the French site FN (paywalled) has had some points translated [PR]

  • Sigma will develop new full-frame mirrorless lenses for Sony E-mount (only the wide angle lenses can be made smaller)
  • Sigma will make more DSLR lenses available in Sony E-mount in the future
  • Sigma will develop new zoom lenses for Nikon.Canon DSLR cameras
  • The new Sigma 70mm f/2.8 DG Macro Art lens is not available in Nikon F-mount because of the new autofocus motor they implemented in the lens (similar to the Nikon AF-P lenses)
  • The new Sigma 105mm f/1.4 DG HSM Art lens is much bigger than the Nikon version because it offers less vignetting (2 EV for the Nikon lens at f/1.4 vs. 1.6 EV for the Sigma lens)

Last week (main rumour page) Sigma’s CEO was interviewed for a French website Mizuwari [Google xlt] where he covers quite a few topics such as the use of plastic for lens elements (poor thermal performance), curved sensors (good for phones), Foveon chips for others (it depends) and possible MF from Sigma (too expensive).

9th A Japanese patent application [HiL] includes and APS-C 18-135 f/3.6-6.5 zoom and an 18-185 version for mirrorless/compact

18-135 lens

8th Apodization [WP] gets an outing in a whole range of Canon fast prime lens designs (24/1.4 shown below) in a new US patent application [USPTO]


The elements 21/22 in the example above have a graded optical transmission (darker at the edges), which improves some aspects of image sharpness and OOF performance.

Probably more than you wanted to know about the construction of IS units in lenses in two Canon US patent applications [#1, #2]

Canon IS unit

7th I’ve just published my first review of Canon’s new TS-E lenses, starting with the TS-E135 f4L Macro

The review includes a lot of detail about how you use this excellent lens, not just lens info.

One example – taking a photo looking down my stairs at f/4 with all steps in focus.

stairs livewiew

New firmware for three EF-M lenses supports ‘dual sensing IS’  – as found on the new M50 (and only M50)


6th Just how big a rear element can you fit into the EF mount?  The Mitakon Speedmaster 50mm f/0.95 seen at CP+ has a go [DCW]

mitakon 50mm f/0.95 rear

That pretty much rules it out for Nikon F and Sony FE.

mitakon 50mm f/0.95

2nd One for macro fans – I’ve just finished my review of the Laowa 25mm f2.8 2.5-5x macro lens

Here next to my Canon MP-E65, which it slightly bests, wide open

extended lens comparison

1st A Japanese patent application for a 15-105 mm F1.8 – 6.0 for APS – C mirrorless lens appears [HL]

Canon 15-105 patent

Zoom ratio: 6.75
Focal length: 15.21 52.83 102.65 mm
F no .: 1.85 4.20 6.00
Image angle: 36.19 14.50 7.58
Image height: 11.13 13.66 13.66 mm
Lens length: 83.84 101.55 121.52 mm
Back focus: 3.81 3.81 3.81 mm


A Canon patent application [USPTO] looks at eliminating the annoying self zoom creep of some lenses when pointed up/down.

lens structure


27th Updates on the way  for Sigma lens firmware, offering Canon lens aberration data.

Sigma has announced the two new lenses – both look very interesting examples of lens design
I’ve just published a news article with all the new Sigma lens info

Also of note is the addition of E mount versions for many ‘Art’ lenses

Here’s the internal design of the 105/1.4


25th Two hefty lenses in the ‘Art’ category on the way from Sigma. [DCI]

A 105mmf/1.4 (described as possibly for Sony FE as well as Canon/Nikon)

sigma 105mm f1.4

A 70mm f/2.6 macro

sigma 70mm f2.8 macro

23rd canon 470EX-AIThe Speedlite 470 EX – AI

  • Auto intelligent (AI) bounce mode of “Full Auto” and “Semi Auto”.
  • With an electric head rotation device, the 470EX-AI automatically determines the optimal bounce position eliminating unnecessary shadows.
  • The guide number is 47 (105 mm).
  • It is driven by 4 AA batteries.
  • It covers the field angle of 24 – 105 mm. Wide panel (14 mm adapter) allows light to spread wide.
  • Clip-on bounce adapter that makes light more soft.
  • Equipped with a dot matrix display that can display more detailed information.
  • The setting can be quickly changed with the shortcut button and the controller wheel.
  • Size 74.6 x 130.4 x 105.1 mm.
  • Weight 385 g (excluding batteries).

A note from Sigma in the US says their new 12-24mm f/2.8 will be available for $1299 in mid March.

B&H | Adorama pre-order 

22nd  The Tamron 70-210mm f4 VC is announced.

tokina 50mm f1.4Tokina will soon be announcing an ‘Opera’ 50/1.4  AF full frame lens

It won’t appear until September though [Nok]

The Canon 135 is here and it is one hefty lens…


20th The Samyang 50/1.2 is announced

I’ve a Canon TS-E135mm F4L Macro coming for a review
please email me if you’ve any specific questions?

18th A busy time at [Nokishita] with images of a Samyang XP 50/1.2

samyang xp50 f1.2

xp50 f1.2

and a suggestion that the pending Tamron lens is a 70 – 210 mm F/4 Di VC USD

tamron zoom

15th A new teleconverter patent application from Canon [USPTO] includes several optical formulae (the TC is marked ‘LC’ below)

teleconverter designs

Three Canon zoom lens US patent applications – more video oriented with high zoom ratios.

#1, #2, #3

A Canon US patent application [USPTO] looks at using diffractive optics for longer wavelength infra red optics

It’s still time for superzooms for 1″ sensors in a series of Japanese patents for 20x zooms. [HL]

Canon 20x zoom

14th Tamron have a new lens teaser image doing the rounds – difficult to say anything more than it doesn’t look like an ultra-wide or a long telephoto. No doubt it will appear soon for CP+

13th An EF-M 32/1.4 is expected [CR] in the run up to Photokina.

9th The Sigma 14-24 is announced [info and specs]. It will be interesting to compare with the 12-24mm that’s in my detailed Sigma 12-24mm f4 review and exploration of using the 12-24mm for architecture.

A Canon patent application for mirrorless zoom designs in the  ~18-150 f3.5-6.5 category [USPTO]

mirrorless zoom

8th Images of the new Sigma lens appear [Nok] 1150 gm – 11 groups 17 elements – 9 blade circular aperture

sigma 14-24mm f2.8 dg hsm art lens

7th Suggestions that we are soon getting a Sigma 14-24 mm f / 2.8 DG HSM Art [Nok]

2nd A new 24-70 2.8L is suggested in the Photokina timeframe [CR] but with something ‘different’

How about a change to Canon’s long lasting detachable lens mount? A lot of people would like to see Canon make it easier to fit to ‘Arca Swiss’ style base plates.

1st An upcoming EF-M lens is said to be ’50mm equiv’ and ‘fast’ [CR]

Some specs for the Laowa 2.5-5x Macro I’m testing

25mm specs

I’m only just getting into some testing, but here’s an animation, based on stacking 114 images (x 50MP) at x5 and f/2.8

Made using Helicon Remote/ Focus for stacking and 3D visualisation.

A 100% crop of the actual still image with a scale marker [click to enlarge]

sodimm 100


30th Maybe I’ll get round to updating my 70-200 2.8L IS some time … it seems there is talk of a Mk3 version out for testing [CR]

28th Some shots of a Laowa 9mm f/2.8 lens for mirrorless (inc. EF-M) are spotted  [PR]

If the image quality is on a par with the Laowa 12mm f/2.8 I reviewed then this is a great APS-C option.


23rd Venus Lens have kindly sent me the Laowa 25mm f/2.8 2.5-5x Extreme Macro lens to try out. I’ll be writing up a review in due course. I’m very interested in this lens since I happen to have the (somewhat bigger) Canon MP-E65 and use it for quite a bit of our macro work. – please do email me if you’ve any specific questions?

[Click to enlarge]

extended 5x comparisonmin-mag comparisonx2.5 on 5Ds

18th Suggestions for two EF-M lenses this year [CR] – first up a prime of some sort within the next month or so.

16th I’ve been testing a new lens adapter for the TS-E17 and TS-E24 tilt/shift lenses.

The Rogeti TSE Frame lets you attach the lens to the tripod and shift the camera. I get to see a lot of camera gadgets, and not many get such a quick promotion to my camera bag ;-)

11th Two interesting primes in a Japanese patent application a 15/4 EF and a 9.5/4 for APS-C (likely mirrorless, with short backfocus distance) [via CN]

Some short telephoto primes in a new Japanese patent application [via CN]

  • EF 50mm f/1.8
  • F 85mm f/1.4
  • EF 85mm f/1.8
  • EF 100mm f/1.8

A Canon US patent application [USPTO] shows a lens barrel design for inserting optical filters into and out of the optical path

moveable filter

A patent app last year showed a mirror lens with a variable electronic ND filter in it. A new US application [USPTO] shows an electrochromic variable filter design. A compound changes its optical properties in response to an applied electrical signal via transparent electrodes.

EC filter unit

One of the issues is avoiding colour shift as the density is changed, whilst the chemical mix of the inner filtering layer sets the overall transmission spectral response.

This example shows the filter inside a lens.

ec filter in lens

9th Nikon announce their version of the Canon 200-400 f4L 1.4x TC I’ve put full details of the 180-400 f4 TC1.4 on their own page (UK and US info) – Just £11,000 and available in March.

You may remember that the 200-400 was first mentioned in Feb 2011, but not formally announced until May 2013. I’m minded to suggest that the days of being able to ‘get away with’ such a long time gap are long gone…

8th The Samyang 14/2.8 AF lens is announced for the EF mount.

4th It looks as if we’re about to start seeing more EF mount AF lenses from third party lens makers

A Samyang 14/2.8 was announced for E mount – now it looks as if we might be seeing it in EF?

If it’s of similar quality to the Samyang  XP 14/2.4 I reviewed a while ago, this looks interesting.

sy14-28 ef-2

sy14-28 ef

via Nok

A good indication of how much easier curved sensors make some aspects of lens design is shown in this Nikon full frame patent app ~50mm f/2.8 [via HL]

nikon curved sensor


1st A Japanese patent application spotted at CN shows aspects of adding IS to a TS-E tilt shift lens (including the problems of flexible electronic connectors)

A US patent from last January [Jan 7th 2017 here] includes a similar diagram, although in the context of a lens adapter with tilt and shift.

A US patent application [from July] found in Oct 16th here shows an actual construction for a TS-E lens with IS/AF.

With the 2017 patent info, I had wondered if updated TS-E lenses might get some more electronics. Unfortunately, the new TS-E50/90/135 lenses don’t even have encoders to let the body know what the tilt/shift settings are, so we’ve a long way to go. The TS-E24 is very good optically and the 17mm is one of my go-to lenses. I don’t see any pressing requirements for updating either, especially since wide TS-E lenses tend to be used in circumstances where AF and IS are of limited use. OK I’d not be averse to to a TS-E14 0r 15, but I suspect that’s such a difficult lens to design with a large image circle, that it’s well down Canon’s to-do list.


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