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Canon EOS R3 camera information

  |   Canon camera rumour, Rumours

The EOS R3

Canon’s pro level mirrorless (but not 1 series)

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The R3 finally brings back the ‘3’ designation for a Canon camera.

It looks to be positioned between the R5 and a future R1.

The original EOS 3D rumour page dated from 2004 and was one of our oldest and is now effectively archived as of a few days ago.

Some of what were 3D rumours did actually appear in the guise of the 5D. Many suggestions seem to be inspired by the EOS 3 film camera, with its ‘eye control’ AF system. If you’re curious, I collected some EOS3 specs at the end of this page (launched Oct 98)


r3 ad

R3 Latest News

2021 May

3rd A few snippets of R3 info appear in a Russian R3 interview [via CR]

As expected, it’s not the ‘flagship’ mirrorless. Not one for me, since it’s intended for wildlife, sports, racing, and photojournalism.


21st Until Canon starts to officially ‘leak’ info, there is mostly speculation. A hint dropped to [CR] suggesting that the sensor AF system would be improved. This could be as simple as alternating left-right and up-down pixel splits or it could be as advanced as having four sub-pixels per pixel.

Expect a few new features… Oh and the R1 won’t be along for quite some time.

14th The R3 gets a formal development announcement and will be available in 2021

So, the ‘3’ line is indeed resurrected, along with eye focus.  There are no real specs, but 30fps does fit with ~45MP and the maximum transfer rate of CFExpress cards


Here’s a rough guide to its comparative size against the 1D X III



13th At last, an update for my 3D page with what seems to be an R3 [Nok] due for a ‘development announcement’.

Are we going to see a return of ‘3’? Is this top end or perhaps the high MP mirrorless (R5s/RS page)




2018 December

20th Mirrorless EOS R is the future, so I’m expecting the next appearance of ‘3’ in a mirrorless model.

This raises the issue of just what the EOS R numbering system will be?

So will it be an EOS 3R or an EOS R3?

And, what many seasoned 3/3D watchers will wonder, is will it have eye controlled AF?

The 3D stuff (dating back to 2004) is now on the Original 3D rumours page

EOS-3 specs

“A sturdy and modern, full-featured SLR for professionals and advanced amateurs alike, the EOS-3 incorporates a host of technological advances that raise the bar for performance in a high quality 35mm SLR. These features include a 45-point autofocus system, Canon’s amazing Eye-Controlled AF, predictive AF up to 7 frames per second (with optional Power Drive Booster PB-E2 and NP-E2 battery pack), E-TTL auto flash, 18 custom functions, compatibility with Canon’s full range of autofocus lenses and Speedlites, and much more. These capabilities are incorporated into a rugged body with easily accessible controls for quick and easy execution of camera operations. Almost instinctual, the EOS-3 will help to ensure that you never miss a shot again.”

Product Features

Professional 35mm SLR camera with up to 1/8000 second shutter speed (body only)
Features 45-point Area AF, 21-zone metering, and proven EOS-1N control layout
18 custom functions
Wireless TTL system with Speedlites
Large selection of interchangeable AF lenses, flash systems, and remote controllers

Technical Details

Camera type: 35mm AF/AE single-lens reflex with focal-plane shutter and built-in motor drive
Picture sizes: 24mm x 36mm
Compatible lenses: Canon EF lenses
Lens mount: Canon EF mount
Viewfinder type: Eye-level pentaprism
Viewfinder magnification: 0.72x (-1 diopter with 50mm lens at infinity)
Diopter: -1 (20mm eye relief)

Exposure metering modes: 

TTL max. aperture metering with a 21-zone silicon photocell.
Evaluative metering (linkable to any point),
Partial metering (approx. 8.5% of viewfinder at center)
Center spot metering (approx. 2.4% of viewfinder at center)
Spot metering (linked to focusing point at approx. 2.4% of viewfinder)
Multi-spot metering (Max. 8 multi-spot metering entries)
Center-weighted averaging metering

Exposure Control Methods: 

Program AE (shiftable)
Shutter speed-priority AE
Aperture-priority AE, Depth-of-field AE
E-TTL program flash AE
A-TTL program flash AE
TTL program flash AE

Metering range: EV 0 to 20

ISO film speed range: ISO 6 to 6400

Autofocus type: TTL-AREA-SIR with a CMOS sensor

Focusing points: Area AF with 45 focusing points

Focusing modes:

One-Shot AF: Autofocus stops when focus is achieved, resulting in AF lock
Predictive AI Servo AF: Tracks subject movement up to the start of exposure
Manual focusing: Enabled with the focusing ring when the lens focus mode is set to MF (or M)
Full- time manual focusing: Enabled with the electronic focusing ring during continuous shooting (except during film exposure)

Other features

Shutter type: Vertical-travel, focal-plane shutter with all speeds electronically-controlled.
Shutter speeds: 30 to 1/8000 sec. in 1/3-stops, X-sync at 1/200 sec.
Shutter release: Soft-touch electromagnetic release
Self-timer: 10-second or 2-second delay
Film loading: Automatic
Automatic rewind: Yes
Flash contacts: Hot shoe: X-sync direct contacts, Below camera back latch: JIS B-type socket (threaded)
External flash system compatibility: E-TTL autoflash, A-TTL autoflash, TTL autoflash
Custom Functions: 18
LCD panel: Displays shooting, metering, AF, and film advance modes; shutter speed, aperture, frame counter, and battery level. Illumination provided
Remote control: Quick-lock, three-pin remote control connector provided (N3 type.)
Power source: One 2CR5 lithium battery housed in the camera grip
Width: 6.3 inches
Height: 4.7 inches
Depth: 2.8 inches
Weight: 27.5 ounces (body only, excluding battery)

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