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Canon EOS R3 vs Canon EOS R8

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

CanonEOS R3CanonEOS R8
Overview
ReleasedNovember 2021April 2023
Image and sensor
Camera typeMirrorlessMirrorless
Sensor formatFull frameFull frame
Sensor typeBack-illuminated stacked CMOSCMOS
Sensor dimensions36 × 24 mm35.9 × 23.9 mm
Effective resolution24.1 MP24.2 MP
Largest image6000 × 40006000 × 4000
RAW recordingYesYes
Standard ISO range100–102400100–102400
Sensor detailApproximately 24.1 million effective and 26.7 million total pixels; full-frame back-illuminated stacked CMOS, approximately 36 × 24 mm in the maker's technical guideApproximately 24.2 million effective and 25.6 million total pixels; 35.9 × 23.9 mm CMOS with fixed low-pass filter and integrated sensor cleaning
Image formatsJPEG, HEIF, RAW and C-RAW; CR3 still RAW and CRM movie RAW filesRAW and C-RAW with 14-bit conversion using electronic first curtain or 12-bit using electronic shutter; 8-bit JPEG and 10-bit HEIF, with simultaneous RAW and JPEG or HEIF
ISO detailStandard still-photo ISO 100–102400, expandable to ISO 50 or 204800; normal movie ISO 100–25600, or ISO 800–25600 with Canon Log 3Standard still-photo ISO 100–102400, expandable to ISO 50 or 204800; movie sensitivity depends on frame rate and Canon Log or HDR settings
Image processorDIGIC XDIGIC X
Lens and shooting
Lens mountCanon RFCanon RF
StabilisationLens and sensor shiftOptical lens stabilisation
Maximum continuous burst30 fps40 fps
Lens detailCanon RF lenses; EF/EF-S lenses via EF-EOS R adapter, excluding EF-M; EF-S lenses use approximately 1.6× cropRF and RF-S directly; EF and EF-S via EF-EOS R mount adapters; RF-S and EF-S use 1.6× cropping; EF-M incompatible
AutofocusDual Pixel CMOS AF II with people, dogs, cats, birds and motorsport vehicle recognition; up to 4779 manually selected still-photo positions; −7.5 EV still-photo claim with f/1.2 non-DS lens, centre point, One-Shot AF, ISO 100 and room temperature. Eye-control selection is for stills only, requires calibration and may be affected by eyewear, individual eyes and shooting conditionsDual Pixel CMOS AF II with 1053 automatic areas and 4897 selectable still-photo positions (4067 for movies); human, animal and vehicle recognition; AF area coverage depends on lens and mode
ShutterMechanical and electronic first curtain up to 1/8000 second; electronic up to 1/64000 second in Tv/M with restrictions; Bulb supportedElectronic first curtain 30–1/4000 second plus Bulb; electronic 30–1/16000 second, with 1/16000 restricted to Tv or M and unavailable in H+; no mechanical first curtain
Burst detailNormal full-resolution continuous shooting up to 30 fps electronic with AF/AE tracking or 12 fps mechanical/electronic first curtain, depending on lens, battery and settings. Separate custom high-speed mode in firmware 1.2.0 or later reaches 195 fps for up to 50 frames; maker drive-mode manual fixes shutter speed, aperture and ISO from the first shot, and Amateur Photographer reports fixed AF/AE in this brief burstUp to 40 fps electronic or 6 fps electronic first curtain; UK maker buffer claim 120 JPEG, 56 RAW or 100 C-RAW at 40 fps; 30 fps RAW Burst mode with up to 0.5 second pre-capture is separate; lens, exposure, lighting and subject conditions affect speed, and electronic rolling-shutter distortion is possible
Stabilisation detailFive-axis in-body image stabilisation coordinated with compatible lens optical IS; Canon UK claims up to eight stops with specific RF lenses, not every lensNo sensor-shift IBIS; optical stabilisation depends on the attached lens; Movie Digital IS is available separately
FlashMulti-function accessory shoe; mechanical flash sync 1/200 second, electronic first curtain 1/250 second and electronic shutter 1/180 secondExternal E-TTL II EX/EL Speedlite support through the multi-function shoe; electronic-first-curtain sync 1/200 second
Exposure controls–Scene Intelligent Auto, Fv, P, Tv, Av, M, Bulb and two custom modes; 384-zone evaluative, partial, centre spot and centre-weighted metering; ±3 EV compensation
Video
Highest video resolution6000 × 3164 at 59.94 fps3840 × 2160 at 59.94 fps
Video detailInternal 6K RAW 6000×3164 up to 59.94/50 fps on CFexpress; oversampled uncropped DCI/UHD 4K up to 59.94/50 fps; 4K high-frame-rate 119.88/100 fps; Canon Log 3 and HDR PQ. RAW, 4K high-frame-rate and 4K60 ALL-I are not recordable to SD cardsFull-width UHD 3840 × 2160 up to 59.94/50 fps oversampled from 6K; optional cropped mode uses 62% of the horizontal area; Full HD up to 179.82/150 fps slow motion without sound; internal 8-bit 4:2:0 or 10-bit 4:2:2, Canon Log 3 and HDR PQ; normal clip limit two hours, subject to temperature, with maker approximately 30 minutes 4K 59.94p starting at 23°C
AudioBuilt-in monaural microphone; 3.5 mm stereo microphone and headphone sockets, plus compatible multi-function-shoe audio accessoriesBuilt-in stereo microphone; 3.5 mm external microphone and headphone sockets
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3.2″3″
Screen dots4,150,0001,620,000
TouchscreenYesYes
Tilting screenYesYes
Display detailFully articulated 3.2-inch capacitive touchscreen; technical guide specifies approximately 4.15 million dots, while the UK store rounds this to 4.2 million; approximately 100% coverageVari-angle 3-inch Clear View LCD II capacitive touchscreen with approximately 1.62 million dots and 100% coverage
Viewfinder detail0.5-inch OLED EVF, approximately 5.76 million dots, 100% coverage and 0.76× magnification with 50 mm lens at infinity0.39-inch OLED, approximately 2.36 million dots, 100% coverage and 0.70× magnification; display refresh approximately 60 or 120 fps with mode- and shooting-dependent reductions
Connections and design
Wi-FiYesYes
BluetoothYesYes
Battery life (maker's claim)620 photographs220 photographs
Body weight822 g414 g
Release detailCanon Camera Museum records marketing in November 2021; no exact first-sale day is inferredCanon Camera Museum records first marketing in April 2023; no exact first-sale day inferred
Recording mediaOne CFexpress Type B slot and one SD/SDHC/SDXC UHS-II slot; recording to both is limited by the slower cardSingle SD, SDHC or SDXC slot with UHS-II support; high-speed UHS-II recommended for 4K and fast bursts
PortsUSB-C 3.2 Gen 2, micro HDMI Type D, RJ45 Ethernet, 3.5 mm microphone/headphone sockets and N3 remote-control terminalUSB-C 3.2 Gen 2 for transfer, power and charging; micro HDMI Type D, microphone and headphone sockets, E3 remote terminal and multi-function shoe
Wireless connectionsWi-Fi 802.11a/b/g/n/ac at 2.4/5 GHz with regional frequency restrictions; Bluetooth Low Energy 5.0; built-in GPS, GLONASS and MICHIBIKI positioningWi-Fi 802.11b/g/n at 2.4 GHz and Bluetooth Low Energy 4.2; regional restrictions may apply
Battery life detailLP-E19; CIPA power-saving approximately 620 EVF or 860 screen shots at 23°C using an SD card; smooth-display approximately 440/760 shots under the same maker conditionsLP-E17; maker CIPA power-saving claim at 23°C approximately 220 photographs with EVF or 370 with LCD
ChargingIn-camera charging with optional USB Power Adapter PD-E1; this adapter does not power the camera while operating; AC-E19 and DR-E19 provide optional AC powerSupplied LC-E17E external charger; USB charging supported with authenticated batteries, using compatible power equipment
DimensionsApproximately 150 × 142.6 × 87.2 mm (width × height × depth)Approximately 132.5 × 86.1 × 70.0 mm (width × height × depth)
Weight detailApproximately 822 g body only, excluding body cap, eyecup and multi-function-shoe cover; approximately 1015 g including battery and CFexpress card; photographed kit lens excludedApproximately 414 g body only or 461 g with battery and card under CIPA guidelines
MaterialsMagnesium-alloy body with dust- and moisture-resistant construction; resistance is not an underwater ratingPrimarily magnesium alloy with aluminium alloy and glass-fibre polycarbonate components; maker describes dust- and water-resistant construction with covers closed, but not waterproof
In the boxUK body package includes LP-E19 battery, LC-E19 charger and AC cable, R-F-5 body cap, ER-h small eyecup, IFC-100U interface cable/protector, ER-L1 strap and accessory-shoe cover–

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