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Canon EOS R3 vs Canon EOS R8 Mark II

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

Better figure, where one is clearly better

CanonEOS R3CanonEOS R8 Mark II
Overview
ReleasedNovember 2021Coming late October 2026
Image and sensor
Camera typeMirrorlessMirrorless
Sensor formatFull frameFull frame
Sensor typeBack-illuminated stacked CMOSCMOS
Sensor dimensions36 × 24 mm36 × 24 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 guideFull-frame 36.0 × 24.0 mm CMOS with approximately 24.2 million effective and 25.6 million total pixels; fixed low-pass filter and integrated sensor cleaning
Image formatsJPEG, HEIF, RAW and C-RAW; CR3 still RAW and CRM movie RAW files14-bit RAW, C-RAW and Dual Pixel RAW; 8-bit JPEG and 10-bit HEIF; 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; normal movie ISO 100–25600, with expansion dependent on recording mode
Image processorDIGIC XDIGIC X
Lens and shooting
Lens mountCanon RFCanon RF
StabilisationLens and sensor shiftSensor shift
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× cropCanon RF and RF-S lenses directly; EF and EF-S via an EF-EOS R adapter; EF-M incompatible; RF-S and EF-S use 1.6× cropping
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 up to 4368 selectable still-photo positions and 1053 zones; people, dogs, cats, birds, horses and vehicle detection, plus registered-person priority; coverage and available areas depend on lens and AF 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 Fv, Tv or M; 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 burstElectronic H+ up to 40 fps, H 20 fps or L 5 fps; electronic first curtain up to 6 fps; maker electronic buffer 190 JPEG or 73 RAW under One-Shot AF, ISO 100 and 23°C with a 128 GB UHS-II card; lens, battery, shutter, aperture, lighting and settings affect speed; pre-continuous capture retains up to 20 earlier frames
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 lensFive-axis sensor-shift IBIS with coordinated optical lens stabilisation; maker up to 7.5 stops at the centre and 7.0 at the periphery under CIPA 2024 yaw, pitch and roll testing with RF 24-105mm F2.8L IS USM Z at 105 mm; Movie Digital IS is separate
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 Speedlite support through the multi-function shoe; full-frame electronic-first-curtain sync 1/200 second, or 1/250 with supported Sync speed priority
Exposure controls–Auto, scenes, Fv, P, Tv, Av, M and Bulb; ±3 EV exposure compensation in 1/3 or 1/2 steps; 384-zone metering
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 cardsUHD 3840 × 2160 up to 59.94/50 fps oversampled from 6K except cropped and smooth-skin modes; full-width recording with optional crop; Full HD up to 179.82/150 fps; internal H.265 or H.264 with 10-bit 4:2:2 options, Canon Log 3, PQ and HLG; normal clip limit up to six hours below 100 fps, subject to temperature, power and other limits
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 input and headphone output; compatible multi-function-shoe accessories support four-channel audio
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% coverage3-inch vari-angle Clear View LCD II 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 with approximately 2.36 million dots, 100% coverage, 0.70× magnification and refresh up to 120 fps; refresh may fall during focusing or shooting
Connections and design
Wi-FiYesYes
BluetoothYesYes
Battery life (maker's claim)620 photographs220 photographs
Body weight822 g499 g
Release detailCanon Camera Museum records marketing in November 2021; no exact first-sale day is inferredCanon USA announced on 15 September 2026 and expects body and RF 24-50mm kit availability in late October; Canon UK currently lists pre-order; no precise 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 cardOne SD, SDHC or SDXC slot with UHS-II and UHS-I support; maker recommends high-speed UHS-II SDXC for 4K video 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, 3.5 mm 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 802.11ac at 2.4 or 5 GHz and Bluetooth 5.3; 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 rechargeable lithium-ion battery; maker CIPA power-saving claim at 23°C approximately 220 photographs with EVF or 340 with LCD; accessories powered by the shoe can reduce endurance
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 powerUSB charging supported with authenticated compatible batteries; optional LC-E17E external charger or PD-E1/PD-E2 USB power adapter; UK box list does not include a charger
DimensionsApproximately 150 × 142.6 × 87.2 mm (width × height × depth)Approximately 131.4 × 90.0 × 79.7 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 499 g body only; 546 g including card and battery 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; dust- and water-resistant construction is not waterproof, and shoe cover is required for sealing unless a sealed accessory is fitted
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 coverCamera body, ER-SC2 shoe cover, R-F-S camera cover, ER-100G neck strap, LP-E17 battery and cover, and user manual (UK maker list)

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