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Canon RF / EF Lenses – rumours and news

  |   Canon camera rumour, Rumours

New Lenses, Canon RF and EF Lenses

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

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EF42mm F1L

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2021 October

6th The dual fisheye is announced – see the full RF 5.2mm dual fisheye announcement page for details and specs.


3rd Looking in the US patent, I find this one from March [USPTO]


A recent Japanese patent makes the detail of the lens design a bit clearer [CN]


2nd A clarification makes it a Canon RF 5.2mm f/2.8L Dual Fisheye

A specialist VR capture lens – yes, that is a definite ‘Because we can’ Canon lens…

1st A tweet from the usually reliable [Nok] suggests a 5.2mm F2.8 RF lens

Something lost in translation somewhere I feel? – the focal length is too precise, were there to be a new short focal length fisheye of some sort then it would be a 5mm or 6mm…


14th The 16mm and 100-400mm are launched at the same time as the R3.

1st Next up in the RF lens lineup, a 16/2.8 and a 100-400 [Nok]

Both ‘non-L’ so good for expanding the lens range.

Lots of 2021 stuff has slipped back to 2022/3, but I’m still waiting for those RF mount tilt/shift lenses ;-)


Sorry for website issues (slowness) – we will be moving to a new server, but that is not a trivial matter… (for me to do)

29th RF14-35 announced [see DPR for images etc. ]

MELVILLE, NY, June 29, 2021– Canon U.S.A., Inc., a leader in digital imaging solutions, today announced the RF14-35mm F4 L IS USM lens. This dramatic new lens brings 14mm, ultra wide-angle coverage to full-frame EOS R-series users. On top of the ultra-wide capabilities, the 14-35mm zoom range is the broadest ever in a Canon wide-angle zoom for full-frame AF cameras. For many Canon users, one single lens can potentially handle all wide-angle needs, from vivid, creative ultra-wide imagery to traditional street photography.

The new wide-angle lens is designed for use within the expanding family of EOS R full-frame mirrorless cameras, including the upcoming EOS R3, currently in development. Whether you capture stills, video, or like many creatives today – both – this new wide-angle lens from Canon can help elevate users’ content game when capturing images or video in a wide variety of situations, such as landscape, architecture, and travel.

A compact overall design, and extremely modest overall weight of just 1.2 lbs. — along with excellent balance, during hand-held or even gimbal-mounted operation — add to RF14-35mm F4 L IS USM inviting character. A key feature, sure to appeal to many landscape and nature photographers, is this lens’s ability to accept conventional, 77mm screw-in filters. This is especially noteworthy on a lens for full-frame cameras with 14mm ultra-wide coverage. Additionally, the lens’s close-focusing capability is exceptional for an ultra-wide zoom of its type.

Image Stabilization further enhances the RF14-35mm’s appeal for low-light still imagery, and for steady yet striking wide video footage. Up to 5.5 stopsi of optical Image Stabilization is built-in, and Coordinated IS with cameras such as the EOS R6 and EOS R5 delivers up to 7 stopsii of shake-correction. This can mean sharper hand-held images in low light, even at extremely slow shutter speeds.

The Canon RF 14-35mm F4 L IS USM lens features a bright, constant f/4 maximum aperture, L-Series optical construction — highlighted by three UD-glass elements, and three Aspherical elements — and many of the company’s most advanced proprietary lens coatings, including Sub-wavelength Structure Coating (SWC) and Air Sphere Coating (ASC). These superb lens coatings help minimize ghosting and flaring. Lens placement and coatings are also optimized to help users get clear, high-contrast images, even when there is a bright light source either in, or immediately outside, the frame. Additional features of the Canon RF14-35mm F4 L IS USM include:

  • Compact design — Approximately 1.2 lbs. in weight.
  • Minimum focusing of 7.9 inches at all focal lengths and a maximum magnification of 0.38x at 35mm zoom setting.
  • Optical Image Stabilizer with up to 5.5 stopsi of shake correction.
  • Up to 7 stops of shake correction when paired with Canon EOS R series cameras that feature In-Body Image Stabilizer (IBIS).
  • High speed, smooth and quiet autofocus with Canon’s Nano USM.
  • Control Ring for direct setting changes of aperture, shutter speed, ISO speed and exposure compensation.
  • Superb dust and weather-resistance on par with other Canon L-series lenses.

Pricing and Availability

The Canon RF14-35mm F4 L IS USM lens is scheduled to be available in August 2021 for an estimated retail price of $1,699.00

24th The RF14-35 f4L IS USM should be appearing in the next week or so – probably linked to the R3

This softish image has appeared


17th From the always reliable Nokishita… [Nok]

“The next lens that Canon will announce will be the RF 14-35mm F4L. The lens hood is EW-83P”


19th Patents have been seen, but it seems [CR] that an RF 35/1.2L is due this year, but pushed back towards the end of the year

14th There is some info [CR] about Canon’s last cat lenses – from the 1960’s

13th Has canon decided it’s time for some catadioptric long lenses for the RF system? ;-)

A new US patent application [USPTO] has a number of designs – with IS.

Expect a chorus of disapproval from those who’ve never owned a cat lens ;-)

1200mm f/10.5 | 800mm f/5 | 400mm f/3.6 | 2000mm f/15 | 1200mm f/8

400mm f3.6 IS2000mm f15 IS1200mm f8 IS

Here’s my 1100/10.5 on my EOS RP


5th The 14mm and 24mm RF mount tilt/shift lenses (with AF) get a mention [CR] as something for late 2021. The High MP Canon EOS R gets a mention too for early 2022.

There is patent info showing auto focus with a motorised tilt axis.

This from last year from a patent application in June 2019 [USPTO]



Part of the patent shows example flowcharts for operation and includes the camera working out a ‘subject surface’ and seeing if it can match the plane of focus to the surface. Focusing tilted lenses accurately can be a nontrivial task (focusing with tilt), if you’re looking for precision placement of the focal plane.

The design could help with this, and I note it also goes into some detail concerning measurement of lens setting. Maybe we’ll finally see tilt and shift info recorded in EXIF.

This patent [USPTO] from May 2019 looks at using shift elements to counteract unwanted shift when tilting a lens.

These patents [USPTO, USPTO] from Feb 2019 looks at corrections for tilted/shifted images


29th You want smooth OOF areas? A new Canon US patent application [USPTO] includes numerous designs for full frame lenses with front and rear apodised elements. This is for a 130/1.4


Other designs include: 135/2 | 24/1.4 | 70/1.2

14th Canon announce the expected three lenses

The Canon RF100mm F2.8 L Macro IS USM, Canon RF400mm F2.8 L IS USM and Canon RF600mm F4L IS USM are scheduled to be available in July 2021 for an estimated retail price of $1,399.00, $11,999.00 and $12,999.00, respectively.

100mm macro

The Canon RF100mm F2.8 L Macro IS USM lens is not only Canon’s first RF lens designed specifically for macro photography, but also the world’s first[1] medium telephoto macro lens with a maximum magnification of 1.4x. The new lens, designed for both advanced photo enthusiasts and professionals, takes macro photography expression to the next level with the introduction of a spherical aberration (SA) control ring. The SA control ring allows users to change the character and appearance of the bokeh and obtain a softer focus effect with a simple turning of the ring to the desired result.

Additional features of the Canon RF100mm F2.8L Macro IS USM include:

  • Optical Image Stabilizer with up to five stops of Shake Correction[2].
  • When combined with a camera featuring In-Body Image Stabilizer, up to eight stops of shake correction[3] is possible with coordinated operation of Optical and In-Body Image Stabilizer.
  • Hybrid IS helps to compensate for angular and shift camera shake during macro shooting.
  • High-speed, smooth and quiet auto focus with dual nano USM.
  • Customizable control ring that allows photographers to adjust exposure compensation, shutter speed, aperture or ISO.
  • Rugged Canon L-series dust and water-resistant design.

* Specifications and availability are subject to change without notice.

[1] As an autofocus interchangeable lens for full-frame mirrorless cameras. Canon survey as of April 14, 2021.

[2] Based on CIPA (Camera & Imaging Products Association) standards. Testing performed using the EOS R camera.

[3] Based on CIPA (Camera & Imaging Products Association) standards. Testing performed using the EOS R5 camera.

More at DPR

200mm and 400mm

The Canon RF400mm F2.8L IS USM and Canon RF600mm F4L IS USM are both designed to be optically identical to their EF counterparts. The RF400mm and RF600mm weigh in at 6.37 and 6.81 pounds with a minimum focusing distance of 8.2 and 13.8 feet, respectively. Both lenses share many of the same critical features that help professional high-end super-telephoto lenses stand out from the crowd.

Those features include:

  • Ideal for a wide variety of shooting situations, including sports, aviation, trains, automotive, and wildlife, such as birding.
  • Optical Image Stabilization with up to 5.5 stops[6] of shake correction. Including three IS Operation Modes — still subjects, panning, and irregular movement.
  • Proprietary Canon lens coatings, Super Spectra Coating (SSC), and Air Sphere Coating (ASC) help minimize ghosting and flaring. Lens placement and coatings are optimized to provide users with clear, high-contrast images even when there is a bright light source.
  • Lenses include fluorite and super UD lens elements arranged in such a way to help correct chromatic aberration and make the models more compact. Like the latest Canon EF400mm f/2.8L IS III USM and EF600mm f/4L IS III USM lenses, released in the fall of 2018, weight on these RF-series super-telephotos has been significantly reduced vs. previous-generation Canon super tele designs.
  • Compatible with Canon RF 1.4x and 2x extenders, and feature a customizable electronic focus ring, with manual focus capability during SERVO AF.
  • A nine-blade circular aperture provides users beautiful bokeh and ideally blurred backgrounds when the aperture is stopped down.
  • For added convenience when on a shoot, two focus presets are available. Users can instantly return to one of two memorized focus distances.
  • Rugged Canon L-series dust and water-resistant design with vibration and shock resistance. The front element has been dressed with a fluorine coating for easy cleaning.
  • Infrared reflective pigments with high reflectance and titanium oxide lens barrel coating with silica provide excellent UV weather resistance and heat reduction.

More at DPR

8th Images of the upcoming RF100mm F2.8L Macro IS USM lens are spotted


As yet unknown: the meaning of the ± SA Control ring.

Possibly connected with focus stepping, but no-one knows for sure at the moment.



4th Some Canon lenses very likely to be announced this month [CR]

RF 600mm f/4L IS USM, RF 400mm f/2.8L IS USM and RF 100mm f/2.8L IS USM Macro

1st Several full frame RF ultra-wide zooms appear in a Canon patent [USPTO]

Design options include 10-18mm f/4 | 8-16mm f/4 | 9-15mm f/4 | 9-24mm f/4


Several longer zooms in a Canon US patent applications [USPTO]

70-200 f/4 | 100-500 f/4.6-6.8 | 70-200 f/2.8 | 55-250 f/4.6-6.5 | 100-400 f/5.6-8 |100-390 f/5.6-8

Mostly RF full frame but the 55-250 is for a crop sensor



30th Three new Canon lenses are shown for certification in Russia.[Nok] The three SKU’s are 4857C005, 5053C005 and 5054C005.

No indication as to which lenses they are

25th A Canon US Patent application [USPTO] includes several designs for wide angle primes for RF mount

Examples are 12mm/14mm/20mm all at f/2.8


Of lenses I had, but don’t have any more, the 14mm f/2.8L II is one that I least wanted to get rid of for need of cash…

4th Canon is gearing up for lots of announcements in the second half of this year according to info at [CR]

They have 13 to beat from EF announcements in 1987.

Still excellent ones from that year include the EF15/2.8 fisheye and the original EF50/1.8


11th A Canon patent application [USPTO] includes designs for what could be a range of ‘big white’ RF lenses.

There are a lot of examples in the patent, which also looks at aspects of using aspherical elements up front to reduce weight. If you can replace a multi-element big front element with a single lens, that’s potentially quite a saving.

Examples include: 400/2.8 | 300/2.8 | 500/4 | 600/4 | 800/5.6



22nd Laowa first mentioned their range of f/0.95 lenses a while ago, and it seems they are getting close. First, I may well get a chance to try one, but also the specs have appeared in a more official form (I should note that I sometimes do testing for Laowa, so may not repeat all rumours ;-) )

There are 2 lenses for full-frame mirrorless camera systems, a 35mm f/0.95 lens and a 45mm f/0.95

See details at [DPR]

la35la 45


A Canon US lens patent [USPTO] has a number of design for an internal focusing prime design.

The lens design examples are all quite fast: 24/1.4 24/1.8 28/1.8 35/1.8 50/1.4




13th It looks as if there will be plenty of lenses coming from Venus Optics this year

Some f/0.95 primes and a 12-24 f/5.6 are all listed [via CR]

Having seen the difference in the viewfinder between my 5Ds and EOS RP with my Olympus 50/1.2, ths f/0.95 lenses are definitely ones I’d rather use on a good mirrorless camera.

2020 December

18th It seems that the expected RF70-200 F4L IS has been delayed until at least the beginning of March [CR]

Expect to see a lot more such delays, given the ongoing disruption to global supply chains.

4th I’ve just published my detailed Laowa 15mm shift lens review and made a 15min video about it.


26th A Canon patent application [USPTO] covers a range of similar designs for an RF15-35mm f/4 zoom



14th A quick comparison between the 15mm and 17mm at full shift, with the camera not moved at all.


Interesting, since the RF lens roadmap [CR] includes these two

Canon RF Tilt-Shift Lenses: Canon TS-R 14mm f/4L | Canon TS-R 24mm f/3.5L

9th The Laowa 15mm shift lens has arrived for testing – but it’s raining today…

Laowa_15 and TS-E17


5th A Japanese Canon patent application shows an RF 80mm f/2.8 1:1 macro [HL]


3rd I now have an advance copy of my book to flick through – this is what makes all the work feel worth it ;-)

keith's book

Although I try and cover a lot of types and makes of kit, the majority is using Canon TS-E lenses.



31st Some shots of the rather small RF70-200 F4L IS USM [Nok]

RF70-200 2RF70-200 1RF70-200 3



30th Laowa have announced a full frame 15mm shift lens [details]

The even better news is that one is on its way to me to test :-)

15mm 229th A photo of the RF 50/1.8 [Nok]

rf50mm 1.8

I’ll be interested to see just how good this lens is from an optical POV. Is it to be a box ticking ‘we need a 50’ lens or one to showcase the RF system?


28th A mention of the lens hoods [Nok] means the lenses are on their way:

“RF 70-200mm F4 L IS USM”, “RF 50mm F1.8 STM”, “Lens Hood ET-83G (WIII)” and “Lens Hood ES-65B” have been added to Canon’s latest product list.

This means we should see the RF 50mm f/1.8 STM and RF 70-200mm f/4L IS USM soon.

15th For fans of tilt/shift lenses, I’ve started a series of short videos explaining various aspects of their use.
See the tilt/shift index page for the latest.

A Canon patent application [USPTO] for some RF f/1.8 primes 105mm/130mm/150mm

130mm f1-8

Lots of long telephoto. larger F number designs in a Canon patent application [USPTO]

These are normal long lenses

600mm f/11 | 800mm f/11 | 600mm f/8


…and diffractive optics (DO) designs

600mm f/8 | 800mm f/11 | 400mm f/8 | 600mm f/11


10th Several people have asked about the two T/S lenses in the list below. This is based on a reply I gave on the CR forum:

The Canon patent shows some interesting ideas. However, one of the hardest aspects (I’ve found) of explaining/teaching the use of such lenses is using tilt – not to randomly change focus/tilt settings for the so called ’tilt-shift’ effect, but actually placing the plane of focus exactly where you want it, especially at relatively short distances. The trick can be in appreciating that when a lens is tilted, those numbers on the focus ring no longer mean much.

The patent includes the ability to define two points on a surface and have the camera change the tilt/focus to place a plane of focus through them. Now, it ignores setting the tilt axis, but I can see how defining two points on a plane, the AF system could supply the necessary info in conjunction with the lens focus setting and tilt, to arrive at the correct settings – or tell you that it couldn’t be done.

How much of this patent is just covering potential features and how much reflects potential design is another matter though ;-)

Back to the two suggested lenses (14mm and 24mm)… and what we have now.

The 14mm is quite extreme, I’m not sure how much shift would be available. The TS-E17 already matches the FOV of a ~10mm lens if you shift and stitch. This starts showing the quite extreme distortion from a (correct) rectilinear projection. That said, when using a 14mm I’ve often thought that a few mm of shift would be nice ;-)

The TS-E24 mk2 is pretty good, but obviously could be improved, but for what? It’s fine with my 5Ds (and the R5 I tried recently), so I’d want a hefty MP R5’s’ to go with one… I’d note though that I tried the 24mm with the S1r and pixel shift mode, where an up/down stitch gave getting on for 300MP and some nice pics…

The current 17 is the (slightly) weaker of the two – I recently had a go with the Nikon 19mm and liked it, but I’m still happy to use the 17 for my day to day work.

My recent testing of the R5 was specifically to see how it was with T/S lenses – great, oh and the polarising filter adapter was a nice thing for occasional use too.

The EVF and level actually made hand held use of the 17 a lot easier with shift, especially for shifting (heresy I know, but i like using both hand held)

So, for the putative RF versions…

I don’t mind fly-by wire focus, but please give me more focus throw (or the option for it) than I get with the new 50/90/135. I had a TS-E50 here with the R5, and had forgotten the reduced throw at medium-far distances. Electronic focusing, focus peaking and a good EVF would make my own use of the lenses easier. It could be that AF just works with shift, which might be of some use?

One thing that’s been missing for me from existing lenses is EXIF data with movement/distance info, allowing for lens correction – even when using tilt. The Hasselblad HTS1.5x adapter has encoders for movements, so it can be done (at a price…)

For the two new lenses, I do wonder whether I’d prefer a manual version that just has great optics, with less complexity?

So, yes to new T/S lenses, but I do wonder about the complexity (and price)

One other thought that occurred… let’s say we do get AF and motorised movements. How are they going to explain what you do with it ;-)

If nothing else it could help with sales of my tilt/shift book (coming in November I’ll casually note ;-)

9th A 2021 Canon lens roadmap for RF mount has some interesting items [CR]

  • Canon TS-R 14mm f/4L
  • Canon TS-R 24mm f/3.5L
  • Canon RF 10-24mm f/4L USM
  • Canon RF 14-35mm f/4L IS USM
  • Canon RF 24mm f/1.8 IS STM Macro
  • Canon RF 35mm f/1.2L USM
  • Canon RF 100mm f/2.8L Macro IS USM
  • Canon RF 135mm f/1.4L USM
  • Canon RF 100-400mm f/5.6-7.1 IS USM
  • Canon RF 400mm f/2.8L IS USM
  • Canon RF 500mm f/4L IS USM
  • Canon RF 600mm f/4L IS USM
  • Canon RF 800mm f/5.6L IS USM
  • Canon RF 1200mm f/8L IS USM

The 14 and 24mm TS-R lenses are listed as AF – obviously this interests me.

On that matter…

This is from a patent last June [USPTO]


Part of the patent shows example flowcharts for operation and includes the camera working out a ‘subject surface’ and seeing if it can match the plane of focus to the surface. Focusing tilted lenses accurately can be a nontrivial task (focusing with tilt), if you’re looking for precision placement of the focal plane.

The design could help with this, and I note it also goes into some detail concerning measurement of lens setting. Maybe we’ll finally see tilt and shift info recorded in EXIF.

This patent [USPTO] from May 2019 looks at using shift elements to counteract unwanted shift when tilting a lens.

These patents [USPTO, USPTO] from Feb 2019 looks at corrections for tilted/shifted images

6th A Canon interview [Translated- DCW] shows the 1960 lightweight super telephoto designs which inspired the 600/800mm f/11 lenses for RF mount

1st A Canon patent application describes an RF 8-15mm f4 fish-eye zoom [USPTO]

At 8mm the lens has an image circle less than full frame (as in my EF8-15mm F4L – review)

8-15mm f4 zoom


17th Tamron Japan have extended some factory closures due to reduced demand. [PR]

Several rumours doing the rounds suggest some more exotic RF lenses on the way.

250/2 | 500/2.8 | 70-135/2

All possible, but apart from the last one, very big and very expensive…

13th The RF filter adapter works just fine with a polarising filter and tilt/shift lenses. See my notes about testing it – there is a video too. [TS-E lenses and a polarising filter]

9th A suggestion [CR] that an RF14-21 f/1.4 could be on its way – an optical design for this has been seen in patent details, so it’s a possible (price? If you have to ask…)

8th I’ve an R5 and lenses coming this week to try out and compare to my 5Ds (with TS-E lenses).

I’ll also have a look and see how it performs with my Fotodiox T/S adapter and M645 lenses.

I’ve just recently started making short videos to support articles/reviews, and will try and do some R5 related ones.

However, here’s my recent one about that adapter. The videos are a new thing for me, so please do subscribe to my YouTube Channel to keep updated. Any ideas/suggestions, please feel free to drop me an email…

5th A series of RF lens designs in a Japanese Canon patent application [HL]
24-70mm F4, 16-34mm F4, and 12-24mm F4

The 24-70 looks the same as I have below, the wider ones are in a different patent.

3rd A range of 24-70 f/4 full frame lens variants in a new US patent application [USPTO]

RF 24-70_f4

The 18mm back focus at the wide end and lack of IS in the patents suggest that this is a design study type of patent rather than an actual product.


27th A US patent application has whole host of prime (IS) lens designs [USPTO]

135mm f/2 | 100mm f/2 | 85mm f/1.8 | 85mm f/1.4 | 300mm f/2.8 | 135mm f/2 | 80mm f/1.4 | 50mm f/1.8

The range of designs suggest that it’s a design principle being covered rather than specific lenses we might see as products, but there could be a ‘real lens’ in there somewhere…

RF 100mm f2 IS


13th A US patent application for Canon [USPTO] looks at several versions of an RF24-70 F2.8 IS

RF24-70_28 lens design

Another application [USPTO] looks at wide RF f/2.8 zoom designs (15-35, 14-30)


8th Some Japanese Canon patent applications show more of Canon’s plans for longer RF lenses [HL]

200-800mm F6-8.5

200-800 F6-8.5

RF100-500mm F4.5-7.1 L IS USM


17th One that I hope is of interest to people who’ve looked at my tilt/shift reviews…

Rather nice, this 2016 lens pips the 2007 TS-E17mm in image quality if not coverage, one more reason I look forward to the TS-E17 being updated and improved in RF mount for a high MP EOS R ;-)

9th All the lenses are due to be announced at 1PM (UK time). As expected, quite a lot of specs have appeared via the Nokishita Twitter account.

The current info is summarised at CR

I’m busy working on non camera related stuff – come back at 1pm…


30th I’ve an article about using lens tilt in the latest (free) Photographer Academy E-Zine ‘The Big Photo’

18th Here are the camera products being announced on the 9th of July by Canon

  • Canon EOS R5
  • Canon EOS R6
  • Canon RF 50mm f/1.8 IS STM
  • Canon RF 70-200mm f/4L IS USM
  • Canon RF 85mm f/2 Macro IS STM
  • Canon RF 100-500mm f/4-7.1L IS USM
  • Canon RF 600mm f/11 DO IS STM
  • Canon RF 800mm f/11 DO IS STM
  • Teleconverter RF 1.4x
  • Teleconverter RF 2x

12th A few Canon lenses expected for 2021 [CR] – these are not ‘L’ lenses

  • Canon RF 18-45mm IS STM
  • Canon RF 24mm Macro IS
  • Canon RF 100-400mm IS USM

Whilst I’ve heard about new wide tilt/shift lenses for the RF mount, I’ve no info, other than to note I get such suggestions regularly every few months…

11th SKU codes for upcoming lenses – some are likely to be announced alongside the R5/R6 in early July

  • 4515C005 Canon RF 50mm f/1.8 IS STM
  • 4318C005 Canon RF 70-200mm f/4L IS USM
  • 4234C005 Canon RF 85mm f/2 Macro IS STM
  • 4112C005 Canon RF 100-500mm f/4-7.1L IS USM
  • 3986C005 Canon RF 600mm f/11 DO IS STM
  • 3987C005 Canon RF 800mm f/11 DO IS STM
  • 4113C005 and 4114C005 RF 1.4x and RF 2x

9th A list of 2020 RF lenses to come from Canon via [Nok]

The lenses that Canon will announce during 2020 are the RF50mm F1.8 STM, RF85mm F2 Macro IS STM, RF70-200mm F4 L IS USM, RF100-500mm F4.5-7.1 L IS USM, and RF600mm F11 IS. It seems to be STM, RF800mm F11 IS STM, RF1.4x, and RF2x

The 600/800 are likely to be DO lenses [CR]

4th DxO have added Perspective Efex to the Nik plugin collection. It’s the same as DxO ViewPoint, which I’ve used for years for occasional fine tuning my hand-held shots with shift lenses – particularly up/down stitched pairs with the TS-E17, which is wide enough to make any slight misalignment quite obvious. [Perspective Efex review].

A Canon patent application [USPTO] includes several medium (80-100) telephoto f/2.8 primes, such as this 100/2.8


Zoom lens variations in a Canon patent application [USPTO] This is a full frame 100-600 f4.6-6.8

100-600 f4.6-6.8

other options include

120-700mm f4.6-8

Zoom lens variations in a patent application [USPTO] This is a 24-300 f4-6.5

The examples in the patent are mirrorless designs, but the 19mm image height at the wide end is smaller than you’d expect for a full frame sensor – possible EOS M or, dare we suggest like many patents, just deign ideas.

24-300 f4-6.5

Also variations such as 24-230 | 24-270 f4.5-7.1 | 24-200 f.5-7.1 | 28-220 f4-6.5 | 30-180 f4-6.3




A Canon US patent application [USPTO] covers more details of the electrical and communications aspects of the RF mount. Required reading for third party lens/adapter makers ;-)


The application also includes variations on the mount design.

2nd A low level rumour but the RF100/ F2 L IS Macro would seem a good addition to the RF lens range [CR]


29th FYI I’ve just added another article to the tilt/shift info collection: Using diagonal shift

Samyang announce an 85mm f1.4 AF lens for RF mount. [DPR]


Looks to be very similar to the Sony E mount version.

21st You want zoom?… A Canon patent application [USPTO] includes a 10-800mm f/1.8-4.2 lens design


Unfortunately, the specs suggest it’s a design for a smaller sensor video camera…

A different approach to diffractive optics is outlined in a Canon US patent application [USPTO]


The new approach uses a phase modulation system. The patterns are smaller than the wavelength of light

The pattern on the lens element is formed by using a resist (6A). This when etched produced holes who’s depth directly relates to size of the ‘holes’ in the resist.


As ever, a big reminder that a patent is not a product

9th 5 RF lens stock numbers spotted [Nok]

SKU: 3986C005, 3987C005, 4112C005, 4113C005, 4114C005, 4234C005

One is likely the RF100-500 – Announcements unlikely for a few months.

7th Designs for wide range RF zoom lens appear in a new Canon patent application [USPTO]

This would be a 24-240 F4-6.4


Other examples include:

24-300 F4-6.4 | 24-280 F4-6.4 | 24-200 F4-6.4


30th I just published a short article about using lens tilt to move beyond the ‘model world’ look

Partly because there is so much more you can do with such lenses ;-)

A Canon US patent application shows designs for an RF24-70 f/2.8 IS and RF24-105 f/4 IS [USPTO]

RF24-70 IS

23rd Canon Japanese patent applications show several RF zooms, such as a 70-300 F3.5-5.6 and a 100-500 F5.6-6.4 [HL]



16th A slew of ~f/2.8 macro lens designs for RF mount cover the 90-110mm focal length range in a Canon US Patent application [USPTO] See alo the patent from last week [9th USPTO]

One of these could be the basis for a RF100mm F2.8L 2x Macro



Another Canon patent application [USPTO] looks at lens mount communications, showing for example an a adapter with lens and control ring. Just what you’d want for a combined EF->RF teleconverter, with a control ring on them.


9th Assorted Canon RF zoom lens designs in a new patent application [USPTO]

All around the 15-35/2.8 range.



Several prime lens designs for RF mount cameras in a Canon Patent application [USPTO]

85mm f2_8

Design options include:

90/2.8 | 100/2.8 | 95/2.8 | 110/2.8

The patent looks at various internal focusing options with a concentration on image quality over the focus range, and minimisation of overall lens size.

The length and design suggests we may be seeing ‘Macro’ lenses here

6th As part of my ‘stuck at home work’ I’m writing up three review articles looking at stacking images to increase DOF.

The first looks at using focus stepping… next is stacking images from a moved camera, and finally looking at really tiny stuff…

An RF85/2 IS STM gets a mention at CR

I note the RF 85/1.8 design below…

3rd Two Japanese Canon patent applications [HL] for an RF85/1.8 and RF100/2.8

rf85 f/1.8RF100 f/2.8

Note how broadly symmetrical the designs are – the RF mount’s larger rear elements can reduce the size of the front elements in some designs.

2nd A Canon US patent application [USPTO] shows designs 180º fisheye lens (8mm f/4) – the details suggest it could be a design for a zoom too.


Although the image height in the patent is only 11.4mm this does not mean it’s an EF-M lens – the image projected is a circular fisheye view. More likely design work for an eventual RF fisheye lens at some point.

Two Canon US patent applications [USPTO | #2 ] show manufacturing ideas for DO lens elements



26th Canon is applying for quite a few patents covering aspects of the RF mount and communications protocols involving adapters and the like (teleconverters for example).

Nothing specific in the way of potential products though.

Definitely more of interest for those wanting to create third party devices for the RF system [USPTO#1 | USPTO#2| USPTO#3 | USPTO#4 | USPTO#5 |

23rd Several new Canon lenses appear in certification info [Nok]

  • 3986C005
  • 3987C005
  • 4112C005
  • 4113C005
  • 4114C005
  • 4234C005
  • RF 1.4x Teleconverter
  • RF 2.0x Teleconverter

One is suggested at the RF100-500 f/4.7-7.1 L IS at CR.

Here in the UK we’re stuck indoors, so I’ll be looking at subjects for new articles/reviews more suited to the situation, such as printing, colour management, macro and anything else… [ideas welcome!]

Time perhaps to check back through your archive? – I’ve several hundred thousand images and started looking through some I took with the 1Ds back in 2004. I’ve just written up a look at making an A2 sized print from a crop of a 1Ds (11MP) image. It seems that image processing software has come on a long way.

20th Could we see a burst of new EF-M lenses [CR]

No real details but a plausible list…

  • EF-M 15mm f/2 STM
  • EF-M 52mm f/2 STM
  • EF-M 62mm f/4 Macro IS STM
  • EF-M 18-45mm f/2.8-4 IS STM
  • EF-M 100-300mm f/5.6-8 IS STM

19th A suggestion [CR] that an RF14-28 F2L might be included in a set of f/2 zooms.

If you’re interested in the communication capabilities/protocols of the RF lens mount, a new US Patent application [USPTO] includes more about how it works with an intermediate device between lens and adapter.

13th A Japanese Canon patent application [HL] has designs for RF 85/1.2 and 50/1.2 – both have ~14mm backfocus. Canon is getting a lot of lens design features into their patents, which given the future of the RF system is only to be expected.

12th More adapter/lens comms info in a patent application [USPTO]

Another Canon interchangeable mount adapter patent [USPTO]

Somewhere in this may lay the foundations of how the 18mm flange distance EF-M mount fits in the future of the RF mount (20mm flange distance). I know some are concerned about the mismatch between lenses for Canon mirrorless offerings, but I’ve long had the feeling that there not being a clear ‘upgrade trajectory’ from EF-M to RF is not the big deal some consider. Of course, if/when we see an APS-C RF mount camera, the question becomes even more complex – perhaps there will be a way of using EF-M lenses with an APS-C RF mount camera…

5th A Canon US patent application [USPTO] includes a lot about lens/adapter communications protocols, signals and electrical info.

Probably of distinct use to 3rd party adapter/lens makers…

Several small RF primes are noted in a Canon Japan patent application [CN]

45/1.8 | 35/1.8

There’s an RF24-150 F4 design in a Canon patent application [HL]



28th Panasonic have updated their lens roadmap, adding 6 new lenses and dropping the 100mm macro.

  • 24mm f/1.8 lens
  • 50mm f/1.8 lens
  • 85mm f/1.8 lens
  • Fast wide-angle zoom lens
  • Standard zoom lens
  • Telephoto zoom lens

So, if you add a teleconverter to a tilt/shift lens, do you set tilt using the original or extended focal length? Some experiments were called for…

I’ve just written a follow up to Using extenders with lens shift which looks at Using lens tilt with extenders/teleconverters


tldr: yes for shift, no for tilt

27th In Japan Canon have a patent application for an RF 13-21mm f/2.8 zoom [HL]


22nd Whilst Canon has said it’s going to be releasing quite a few lenses, there are not many details about just what they are. A few suggestion at [CR] add to the existing announcements

  • Canon RF 24-105mm f/4-7.1 IS STM (Announced)
  • Canon RF 100-500mm f/4.5-7.1L IS USM (Announced)
  • Canon RF 1.4x Extender (Announced)
  • Canon RF 2.0x Extender (Announced)


  • Canon RF 10-24mm f/4L USM
  • Canon RF 35mm f/1.2L USM
  • Canon RF 50mm f/1.8 MACRO IS STM
  • Canon RF 85mm f/1.8 IS STM
  • Canon RF 70-135mm f/2L USM ​​​

There have been suggestions of something ‘interesting’ for a while, but definitions of interesting vary rather widely. Whilst we’ve heard that next year there will be an RF TS-E update to go with the high MP ‘pro’ EOS R later this year (or early 2021), that info is even less certain…

21st A Japanese Canon patent application [HL] shows a design for an EVF eyepiece. This is one of the areas that a few years ago Canon noted as falling behind the best OVF experience. Expect quite a good viewfinder on the R5 when it appears.

eyepiece optics

19th 5 stock codes for new Canon RF lenses have appeared at a Russian certification agency [Nok]

3986C005, 3987C005, 4112C005, 4113C005, 4114C005

The first two may be RF extenders. Of the other 3 one is likely the RF 100-500mm f/4.5-7.1L IS USM

That leaves 2 lenses (the new 24-105 isn’t one of them)

13th Canon have formally announced the RF 24-105mm F4-7.1 IS STM. [Lens info]

In a development announcement for the upcoming R5 [R5 page] there is mention of a whole stack of RF lenses

“Alongside the EOS R5, Canon is also developing seven RF lenses and two RF lens extenders scheduled for release during 2020, including the RF 100-500mm F4.5-7.1 L IS USM, Extender RF 1.4x and Extender RF 2x.”

The RF extenders were always very likely [see my testing of the Extender 1.4 III with tilt/shift lenses for more]

RF 1.4xRF 2xRF100-500


11th A bit more on upcoming Tamron lenses from yesterday.

tamron lenses

Oh dear, it seems that the 24-105 is f/4 to f/7.1 in these specs from [NOK]

RF24-105mm F4-7.1 IS STM specs are 13 elements in 13 groups, and the shortest distance is 0.2m (AF) /0.13m (MF) The maximum shooting magnification is 0.4x (AF / 105mm) /0.5x (MF / 24mm), the camera shake compensation effect is 5 stops, the filter diameter is 67mm, Φ76.6mm x 88.8mm, it seems to be 395g.

However, the close focus distance is good and with an EVF and DPF, f/7.1 isn’t quite as awful as it might first appear to seasoned DSLR users. This comparison suggests it will have a place…

Canon RF 24-105 IS STM Canon EF 24-105 IS STM Canon RF 24-104 F4L
Max aperture 4-7.1 3.5-5.6 4.0
Design 13 elements in 11 groups 17 elements in 13 groups 18 elements in 14 groups
MFD .2m AF (.13m MF) .4m AF .45m
Magnification .4x AF (.5x MF) .3x 0.24x
IS compensation 5 stops 4 stops 5 stops
Filter diameter 67mm 77mm 77mm
Size 76.6×88.8mm 83.4x104mm 83.5×107.3mm
Weight 395g 525g 700g

10th Expect more higher end lenses from Tamron as they adapt to the shrinking market [DC]

“In the digital camera market in 2019, the digital camera market saw a 20% drop in the interchangeable lens market and a 12% drop in interchangeable lenses, both of which were down double digits. In interchangeable-lens cameras, mirrorless cameras continued to increase, but the number of single-lens reflex cameras fell by more than 40%, causing the market to shrink.
The interchangeable lens market also shrank due to the camera market. However, even in mirrorless cameras, full-size cameras with high image quality and high unit prices are performing well, and full-size cameras were down only 6% YoY. The market for compact models also continued to shrink, dropping 18% year-on-year.”

A Canon article about the RF70-200 is worth a look, to give an idea of some of the changes we can expect to see as Canon moves away from EF.


6th Some photos of the Canon RF 24-105mm f/3.5-5.67.1 IS STM ‘kit lens’ have appeared via [Nok]

RF24-105mmSTM on camera

RF24-105mm STM

There were also photos of the 850D, but no other new cameras, so if there is a new R camera body, it’s unlikely to be part of the next product announcement … OK, it could be another ‘on its way’ announcement like the 1D X mk3 got.

A US patent application [USPTO] looks at accessories to go between lens and camera. The RF mount has a much increased capability for high speed multichannel communication and Canon clearly have eyes on just what they can produce. The diagram shows just one intermediate unit, whilst the patent also shows stacking.

RF mount accessories

I’ve just written up some notes on using teleconverters with shift lenses and one thing that occurred to me was that we should be due a range of RF->RF and EF->RF extenders. The EF->RF models would make for good solutions for mounting EF glass and could have added features such as a control ring.

The RF mount was designed to offer a lot of new features, relatively few of which have yet been seen.


30th It’s been suggested to us that there is at least one RF mount Canon tilt/shift lens on its way later this year. No specs, but it would confirm my own testing that suggests the RF mount would allow somewhat more shift before mount vignetting becomes a problem. There are Canon patents that include driven movements, although having the movements recorded in EXIF data would be a good start.

There is a mention of Canon RF teleconverters/extenders and an RF 100-500 [CR]

I’d not be surprised to see a combined EF->RF adapter/converter as well to give just that bit more encouragement to move to an RF mount body.

23rd Some lens designs found in Japanese patent applications [CN]

An RF 17-70 f/3.5-5.6 IS would seem to be something for a cheaper kit lens option, whilst a range of long tele lenses seem similar to those seen in US patent info last week (see Jan 16th below) [USPTO]

22nd One advantage of the move to mirrorless and the shorter flange distance for camera mounts is that there is much more space for adapters to work in. I’ve been testing the Fotodiox TLT ROKR tilt shift adapter for a while on my EOS RP, and with ±15mm of shift and 10º of tilt it’s made my old Mamiya M645 medium format lenses a whole lot more useful. I’d go so far as to say it’s added another strong reason to consider updating my 5Ds when Canon bring out a mirrorless replacement.

Anyway, I’ve a review that also looks at how you use tilt and shift with the lenses.

Review: Fotodiox tilt shift adapter

35 shifted

19th Via Chinese social media, some pictures of a new Laowa 15mm f/4.5 W-Dreamer shift lens appear [W]

It seems to have 11mm of shift.




At last I’ve finished writing my book about using tilt-shift lenses – it’s unlikely to be available until later in the year, but it’s been an interesting experience writing for print again.

17th At a presentation in China, it seems that Venus Optics mentioned that hey were going to introduce a new f/0.95 lens under the ‘Argus’ name. Whether this is a one-off or a line of lenses is unknown.

Any actual lenses are unlikely to appear until later in the year – and yes I do hope to add it/them to our Laowa reviews in due course ;-)

Designs for an RF 24-100 F2.8 (and 24-85) are found in a Japanese patent application from Canon [HL]


16th A Canon US patent application has a lot of designs for long white lenses [USPTO]

800/5.6 | 600/4 | 500/4 | 400/2.8 | 300/2.8

Sure, there will be RF mount long white lenses eventually, but the replacement of the EF line-up won’t be rapid.

There’s a RF135/1.4 design found in a Japanese patent application at [CN]

14th Canon is working mostly on new RF lenses… they are not really doing EF any more.

Some comments from Canon Europe’s senior product marketing manager have been widely taken as that they are almost giving up on EF.

Whilst this may be true, it probably wasn’t quite the message that many EF lens users (still the majority of Canon users). Thom Hogan has a good note on this from a marketing perception POV [TH]

I can well believe that they want to switch – the majority of the lens patents I’m seeing are for RF designs.

There will obviously be new RF lenses this year as the range is filled out. Two that get a mention are a basic 50mm and a pancake lens of some sort [CR]. There is also a mention of an RF 70-400mm f/4.5-5.6L IS USM lens – one of many designs already seen in patent info for 2018/2019


9th A Canon US patent application includes designs for a range of fast RF mount primes [USPTO]

85/1.2 | 70/1.2 | 130/1.4 |

The example here is one of several 85/1.2 designs

rf85mm f1.2

8th Canon has released new firmware V1.0.6 for the 70-200mm f/2.8 RF lens

2nd A Canon Japanese patent application [CN] shows a field enlarging teleconverter.


That would allow APS-C lenses to cover full frame sensors, albeit with at least a stop reduction in aperture.

Given the smaller apertures you tend to get with APS-C lenses anyway, I’m not sure I’d really want to use even the moderately good EF-S 15-85 f3.5-5.6 IS on my RP when it becomes f/6-f/9.

Perhaps more use for the likes of the 2014 EF-S 24mm f/2.8 STM

2019 news/patents/articles moved to their own 2019 Lens archive page

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