Canon EF Lenses – rumours and news
New Lenses and Canon EF Lenses
Rumours, news and patents about Canon Lenses and other lens info
For several years I’ve gathered information and links for Canon’s new EF lenses and rumours about new ones. I’ve also written numerous articles and reviews covering lenses and photography related issues.
Please use your own judgement when reading the speculation, and remember that rumours are for entertainment as much as anything else!
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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.
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.
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
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.
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.
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.
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.
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
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).
Graduated filter elements for things such as apodisation appear in a US Patent Application [USPTO]
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 EFLens.com I’ve reproduced below, that we’re currently at a low level of announcements so far for the year (2).
Active links go to that lens’s information page on EFLens.com 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]
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]
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.
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…
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]
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
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.
|Focal length||16.48 – 27.44 mm|
|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 ;-)
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
The MTF chart promises ‘interesting’ wide open performance with those lumps and bumps.
10th Three Nikon designs for wide angle lenses (~20mm f/2) for curved full frame sensors [HL]
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).
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.
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.
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.
Several example designs are included from a long ~800/5.6
to a wider 200/2
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.
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 EFlens.com 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]
17th Diffractive optics is still going strong – this time with A 600/5.6 PF due ‘soon’ from Nikon [NR]
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.
5th A Japanese patent from Tamron [HL] has a star shaped aperture to improve high frequency MTF
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/2.8
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
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]
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.
1st A Japanese Canon patent [CN] shows 135/2 | 185/3.5 | 400/2.8 designs with apodisation filters (11 in the diagram)
28th To go with the new C700FF camera, Canon have announced a 20mm T1.5 video prime lens
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 usa.canon.com/provideo.
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)
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 A 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]
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.
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 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
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.
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.
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]
That pretty much rules it out for Nikon F and Sony FE.
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
1st A Japanese patent application for a 15-105 mm F1.8 – 6.0 for APS – C mirrorless lens appears [HL]
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.
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)
A 70mm f/2.6 macro
23rd The 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.
22nd The Tamron 70-210mm f4 VC is announced.
Tokina 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
and a suggestion that the pending Tamron lens is a 70 – 210 mm F/4 Di VC USD
15th A new teleconverter patent application from Canon [USPTO] includes several optical formulae (the TC is marked ‘LC’ below)
Three Canon zoom lens US patent applications – more video oriented with high zoom ratios.
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]
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]
8th Images of the new Sigma lens appear [Nok] 1150 gm – 11 groups 17 elements – 9 blade circular aperture
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
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
A 100% crop of the actual still image with a scale marker [click to enlarge]
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]
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
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.
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.
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.
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]
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.
2017 news/patents/articles moved to their own 2017 Lens archive page
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Some articles that may be of interest:
- Using a tilt/shift lens - what it is they actually do
- Focus with tilted lenses - lots more information about what's going on when you tilt a lens. See also: Focusing the view camera - External link to [very] detailed coverage of camera movements
- Keith's tilt table spreadsheet (zipped file)
- Using old lenses on your DSLR - fun with adapters
- Keith's lens reviews and lens related articles
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