Canon Lens Rumors

More Canon RF 400mm f/2.8L IS USM information

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Canon will be officially announcing an RF 400mm f/2.8L IS USM super-telephoto lens. This lens is optically identical to the EF 400mm f/2.8L IS USM III. I do wonder if this and the RF 600mm f/4L IS USM will be stopgaps while Canon designs new super-telephoto lenses to take full advantage of the RF mount.

The Canon RF 400mm f/2.8L IS USM will launch at $11,999 USD.

Below is official Canon information about the RF 400mm f/2.8L IS USM.

High-performance, Wide-aperture 400mm f/2.8 Super-telephoto Lens, Exclusively for EOS R-series cameras

Inheriting the optics of the EF 400mm f/2.8L IS III USM, the same high image quality is maintained in the RF400mm F2.8 L IS USM with outstanding sharpness and contrast, center to corner, even at maximum aperture. A combination of Fluorite and Super UD (Ultra-low Dispersion) glass is at the heart of this lens’s outstanding optical performance. At the widest aperture of f/2.8, chromatic aberration is significantly reduced, to achieve tack-sharp images with minimal color fringing. This means detailed results in any shooting condition, particularly in low light levels.

Optically Identical to EF 400mm f/2.8L IS III USM lens

The latest EF version of the 400mm f/2.8L IS lens, introduced in late 2018, preserved the legendary sharpness of previous EF400mm f/2.8L lenses, but with a dramatic reduction in overall weight. The RF version, dedicated to EOS R-series cameras, preserves this advantage, providing outstanding handling for a super-tele lens with an f/2.8 maximum aperture. Numerous optical and mechanical steps combine for this supremely light weight, transforming the RF400mm F2.8L IS USM into a lens that’s equally at home in situations requiring mobility and portability — such as motorsports and wildlife — as it is fixed on home plate at a night baseball game. And, since it uses the same optical design as the EF version III lens, the same superb image quality can be expected.

Optical Image Stabilization with up to 5.5 Stops of Shake Correction, Including Three IS Operation Modes

The RF400mm F2.8 L IS USM features an Optical Image Stabilizer system that provides up to 5.5 stops of shake correction, delivering consistent and sharp results. Whether hand-held or mounted on a monopod (or other devices allowing mobile positioning), the lens’s Image Stabilization can deliver clear image detail in low-light situations or at lower ISOs. This applies when capturing both stills and video, for stable shooting, and sharp final imagery.

Three IS Operation Modes

Three image stabilization modes provide shake-correction for outstanding results in a wide range of shooting situations. These include traditional stabilization, with the correction visible any time IS is active in the camera’s viewfinder (IS Mode 1); helping to correct camera shake when intentionally panning horizontally (or vertically), providing shake-correction perpendicular to the photographer’s panning movement (IS Mode 2); and stabilization that instantly goes into effect only when the shutter is released — no correction visible between shots, in the camera’s viewfinder (IS Mode 3).

Super Spectra Coating (SSC) and Air Sphere Coating (ASC) Helps Minimize Ghosting and Flare

The RF400mm F2.8 L IS USM lens features Canon’s Super Spectra Coating (SSC) that helps maintain overall image quality and color fidelity, as well as Air Sphere Coating (ASC), which significantly helps to reduce the occurrence of lens flare and ghosting. The RF400mm F2.8 L IS USM continues to deliver outstanding images and video, even at maximum aperture, in harsh back-lighting conditions.

Compatible with Canon RF 1.4x and 2x Extenders

To help get you even closer to the subject, attach the compatible Extender RF 1.4x or Extender RF2x to the RF400mm F2.8 L IS USM. Expand effective telephoto power to 560mm at f/4 with the Extender RF 1.4x, or to effective 800mm at f/5.6 using the Extender RF2x. The extenders allow even more telephoto reach when it’s needed, yet allow the user to convert back to an f/2.8 lens for low-light situations by simply removing the extender.

Customizable Electronic Focus Ring, with Manual Focus Capability during SERVO A

The lens’s large manual focus ring is located directly on the lens barrel, and allows you to select from three different manual focus speed levels, to adjust the focus ring rotation to your desired preference. The “1” position on the M.Focus Speed switch provides the fastest sensitivity (a small amount of focus ring rotation provides significant focus change in the lens); settings 2 and 3 reduce this sensitivity, allowing for finer manual focus adjustments.. This can help whether you need a slow speed to switch between someone’s eyes in a distant profile, or a fast speed to dial in on different birds in a large, swiftly moving flock. Additionally, depending on camera settings, manual focus is still possible while AF is engaged, letting you fine tune focus adjustments to suit your shooting preferences.

9-blade Circular Aperture for Beautiful Bokeh

Thanks to its 9-blade, circular aperture, the RF400mm F2.8 L IS USM is capable of gorgeous, evocative out-of-focus areas and soft backgrounds. With rounded rendering of background blur, the 9-blade circular aperture helps create intimacy and intensity in both photos and videos for impactful results.

Two Focus Presets Available — Instantly Return to One or Two Memorized Focus Distances

Quickly select between one or two memorized focus distances, with focus presets. Especially useful for fixed-position sports photography, you can focus upon and memorize two separate focus distances. Then, with a simple twist of the playback ring, immediately jump back to one or the other. A sports photographer, for example, could easily pre-focus on home plate and 2nd base at a baseball game, with the ability to rapidly move focus back to either position with a slight turn of the playback ring on the lens barrel.

Dust- and Water-resistant Design, with Fluorine Coating on Front Element for Easy Cleaning

Built to L series lens specifications, the RF400mm F2.8 L IS USM features a highly durable design for excellent performance even in inclement weather conditions. It delivers a dust- and water-resistant construction with seals around the mount, switches, rings and more. To help maintain a clean lens, even after multiple lens changes in sub-optimal conditions, the RF400mm F2.8 L IS USM has a specially designed fluorine coating on its front and rear surfaces. The coating helps to prevent water, oil and other surface residue like fingerprints from sticking to the lens, which facilitates quick and easy wiping, without the use of solvents.

DJL329

EOS R5
CR Pro
Aug 26, 2010
608
72
www.flickr.com
Wow. :cautious:

I was so sure those photos were fakes! I can't believe Canon just retro-fitted the existing EF lenses to RF.

Now I'm wondering if it'll be the same for the RF 300mm and 500mm versions.
 

Joules

doom
CR Pro
Jul 16, 2017
1,645
1,993
Hamburg, Germany
I'm surprised that there's a market for these things. How many people are interested in these, but have not bought the EF version yet and also hate dislike adapters enough to justify a permanently attached one?
 
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HenryL

EOS R5
CR Pro
Apr 1, 2020
242
591
I'm surprised that there's a market for these things. How many people are interested in these, but have not bought the EF version yet and also hate dislike adapters enough to justify a permanently attached one?
I know at least one...;)
 

john1970

EOS R5
CR Pro
Dec 27, 2015
240
279
Northeastern US
As much as I wished Canon had a new optical design I do understand that these two lenses were only redeveloped two years ago so it makes sense that they would do a retrofit. This is along the lines of what Canon did with the 1200 mm f5.6 years ago, where it was originally a FD mount, but they later retrofitted to a EF mount. I am also looking forward to seeing what Canon does with the RF 500 mm f4, which has not been redesigned since 2011.
 

richperson

EOS 90D
Sep 6, 2019
175
198
I'm surprised that there's a market for these things. How many people are interested in these, but have not bought the EF version yet and also hate dislike adapters enough to justify a permanently attached one?

I'm somewhat glad as it keeps me from feeling like I'm missing something by keeping my older glass. I will be very curious to see what they do with the 200-500mm f/4. It would be great if they could find a way to lighten that one up.
 

padam

EOS R
Aug 26, 2015
1,233
893
I'm surprised that there's a market for these things. How many people are interested in these, but have not bought the EF version yet and also hate dislike adapters enough to justify a permanently attached one?
People buying these prime lenses will also likely to use teleconverters, and the RF teleconverters should perform much better, it was designed like this from the start, both providing an upgrade for EF users as well as starting the new RF super telephoto line-up.
 

privatebydesign

I post too Much on Here!!
CR Pro
Jan 29, 2011
10,263
5,379
As much as I wished Canon had a new optical design I do understand that these two lenses were only redeveloped two years ago so it makes sense that they would do a retrofit. This is along the lines of what Canon did with the 1200 mm f5.6 years ago, where it was originally a FD mount, but they later retrofitted to a EF mount. I am also looking forward to seeing what Canon does with the RF 500 mm f4, which has not been redesigned since 2011.
Not really, regarding the FD1200 they took them all back to the factory (Canon never sold an FD 1200 but lent them out) and rebodied them completely, they also took out the built in 1.4 TC and made them auto focus. I think you’d have to agree that is a bit more than just changing mount.

What would be more interesting is if they felt the pressure to reverse mount any new RF design to EF like they did with the EF 200 f1.8 when they made a very limited number of FD 200 f1.8’s after pushback from some pros.
 

Traveler

EOS R
Oct 6, 2019
94
122
No surprise at all. I said it multiple times that those big telephoto ones are the least in a rush – they are already big and expensive so putting an adapter on each of them doesn't make them significantly more expensive or bigger.
I understand that professionals don't want to bother with "another part that can break" (as they say) so this is just the answer from Canon. Another factor is the ability to use TC – I didn't think of it before.
I guess they'll make new designs in the future but probably nothing that couldn't have been done with the EF mount (talking big primes).
 
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Ekpil

I'm New Here
CR Pro
Apr 20, 2013
16
8
Fake RF Lenses
I own both the 400mm and 600mm EF lll when I start comparing the fotos against my lenses. The original Canon photos are showing the latest EF plus a silver adapter/converter that my be fixed ?
Every new real RF Lense has a control ring. Where ist it ? The length has to be corrected to +25mm (converter EF RF)
Minimum focus distance in the specs is the same. This is same same but different ;-)

We have to wait.
Maybe the marketing is selling that as the first RF Lens that you can convert to EF.