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Sony Alpha 7R III (ILCE-7RM3A) vs Sony Alpha 7R VI

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

Better figure, where one is clearly better

SonyAlpha 7R III (ILCE-7RM3A)SonyAlpha 7R VI
Overview
ReleasedJune 2021June 2026
Image and sensor
Camera typeMirrorlessMirrorless
Sensor formatFull frameFull frame
Sensor typeBack-illuminated Exmor R CMOSBack-illuminated fully stacked Exmor RS CMOS
Sensor dimensions35.9 × 24 mm35.9 × 24 mm
Effective resolution42.4 MP66.8 MP
Largest image7952 × 53049984 × 6656
RAW recordingYesYes
Standard ISO range100–32000100–32000
Sensor detailApproximately 43.6 million total pixels; 3:2 sensor. Pixel Shift Multi Shooting combines four shifted exposures, requiring a static camera/subject and computer processing.Approximately 72.6 million total pixels; effective resolution is up to 66.8 MP for stills and 55.8 MP for movies. Four- or 16-frame Pixel Shift Multi Shooting requires computer compositing; extended RAW processing modes are separate from the 9984 × 6656 normal still output.
Image formatsJPEG, RAW and RAW+JPEG; Sony ARW 2.3, including uncompressed RAW.JPEG, HEIF, RAW, RAW+JPEG and RAW+HEIF; Sony ARW 6.0. Compressed HQ RAW available.
ISO detailStandard still-image ISO 100–32000; expanded ISO 50–102400.Standard still-image ISO 100–32000; expanded ISO 50–102400. Dynamic Active movie stabilisation limits movie ISO to 100–25600 in the exact Japanese specification.
Image processorBIONZ X and front-end LSI.BIONZ XR2 with integrated AI processing unit.
Lens and shooting
Lens mountSony E-mountSony E-mount
StabilisationSensor shiftSensor shift
Maximum continuous burst10 fps30 fps
AutofocusFast Hybrid AF with 399 full-frame phase-detection points and 425 contrast points. Human and animal Eye AF for stills; phase-point coverage differs with APS-C lenses and crop modes.Fast Hybrid AF with up to 759 phase-detection points for stills or movies and approximately 94% still-image area coverage. Recognition covers people, animals, birds, insects, cars, trains and aircraft; Auto subject recognition supported. AF-S sensitivity is EV −6 to 20 with F1.2 at ISO 100, or EV −11 to 20 in the specified Bright Monitoring mode.
ShutterFocal-plane shutter; 30 seconds to 1/8000 second plus Bulb; flash sync 1/250 second. Electronic first curtain and silent shooting supported.Mechanical and electronic shutters; exact Sony specifications list 30 seconds to 1/8000 second for stills, with Bulb for mechanical shooting. Flash sync 1/250 second full-frame or 1/320 second APS-C with compatible Sony flash; electronic first curtain supported.
Burst detailUp to approximately 10 fps with AF/AE tracking, or approximately 8 fps with live view; Sony claims up to 76 compressed RAW/JPEG or 28 uncompressed RAW frames under its test conditions. Settings and shooting conditions affect actual performance.Up to approximately 30 fps blackout-free electronic Hi+ with AF/AE tracking and up to 60 AF/AE calculations per second; mechanical Hi+ up to 10 fps. Maker buffer figures include 215 fine JPEG, 150 RAW or 65 compressed HQ RAW frames; card and recording conditions affect results. Pre-Capture and continuous-speed boost supported; lens compatibility affects maximum speed.
Stabilisation detailFive-axis sensor shift; Sony claims 5.5 stops under CIPA pitch/yaw conditions with Planar T* FE 50mm F1.4 ZA and long-exposure noise reduction off. Correction depends on lens compatibility.Five-axis sensor shift; Sony claims 8.5 stops at the centre and 7.0 at the periphery under CIPA 2024 pitch/yaw/roll conditions with FE 50mm F1.2 GM and long-exposure noise reduction off. Dynamic Active video stabilisation narrows the field of view more than Active mode.
Video
Highest video resolution3840 × 2160 at 30 fps7680 × 4320 at 30 fps
Video detail4K 3840 × 2160 recording up to 30p in NTSC mode or 25p in PAL mode; Super 35mm mode provides full-pixel readout without binning, while full-frame 4K is a separate mode. HLG, S-Log2 and S-Log3 supported.XAVC HS 8K at approximately 30p/25p/24p supports 10-bit 4:2:2 or 4:2:0. 8K oversamples from 8.2K and narrows the field of view. Full-frame 4K 60p is uncropped; uncropped 4K 120p requires 4K angle-of-view priority On. Dual Gain Shooting works only at 4K 30p or lower. Sony's 120-minute 8K claim uses 30p 200 Mbps 4:2:0 10-bit, temperature setting High, monitor open and 25°C ambient; it is not an unconditional recording limit.
AudioStereo microphone; 3.5 mm microphone and headphone sockets.Built-in stereo microphone and 3.5 mm microphone/headphone sockets. Optional XLR-A4 enables up to 96 kHz 32-bit float four-channel in-camera recording through the digital-audio Multi Interface Shoe; this is not an internal-microphone specification.
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3″3.2″
Screen dots2,359,2962,095,104
TouchscreenYesYes
Tilting screenYesYes
Display detailThis separately marketed ILCE-7RM3A revision has a 2,359,296-dot LCD, compared with 1,440,000 dots on the original ILCE-7RM3. Screen tilts approximately 107° up and 41° down; touch focus and touchpad operation supported.Four-axis TFT LCD tilts approximately 98° up and 40° down, opens 180° sideways and rotates 270° in the open position; automatic vertical information display supported.
Viewfinder detail0.5-inch Quad-VGA OLED electronic viewfinder with 3,686,400 dots, 100% coverage and approximately 0.78× magnification with a 50 mm lens at infinity.0.64-inch Quad-XGA OLED with 9,437,184 dots and approximately 0.90× magnification; 60/120 fps display. Sony specifies DCI-P3-equivalent gamut and 10-bit HDR display.
Connections and design
Wi-FiYesYes
BluetoothYesYes
Battery life (maker's claim)640 photographs710 photographs
Body weight572 g622 g
Release detailSony Japan's discontinued-model archive lists June 2021 for ILCE-7RM3A; no precise sale day is claimed. This is a Japanese release month, not a UK date.Sony UK specifies availability from June 2026; month precision is retained. Sony Japan separately specifies 5 June 2026 for ILCE-7RM6, which is not treated as the UK sale day.
Recording mediaTwo media slots; one UHS-II-compatible SD slot and one SD/Memory Stick slot. Simultaneous and relay recording supported.Two multi-format slots, each accepting CFexpress 2 Type A or UHS-I/UHS-II SD media.
PortsUSB Type-C with SuperSpeed USB 5 Gbps, Multi/Micro USB, Micro HDMI, microphone and headphone sockets, sync terminal and Multi Interface Shoe.Two USB Type-C ports; port 1 supports 10 Gbps USB 3.2, port 2 supports 480 Mbps USB 2.0. Full-size HDMI, microphone and headphone sockets, sync terminal and digital-audio Multi Interface Shoe; no Micro USB terminal.
Wireless connectionsWi-Fi IEEE 802.11b/g/n at 2.4 GHz, NFC and Bluetooth 4.1.Wi-Fi IEEE 802.11a/b/g/n/ac/ax at 2.4/5/6 GHz and Bluetooth 5.3; no NFC in maker specifications.
Battery life detailNP-FZ100; CIPA approximately 640 photographs using the LCD or 530 using the viewfinder. In-camera charging and power via USB Type-C or Multi/Micro USB.NP-SA100, 2670 mAh; CIPA approximately 710 photographs with LCD or 600 with viewfinder. USB Type-C Power Delivery charging and power supported; Sony Japan requires a 27 W or higher compatible supply/cable for the specified in-camera charging setup.
DimensionsApproximately 126.9 × 95.6 × 73.7 mm (width × height × maximum depth); grip-to-monitor depth 62.7 mm.Approximately 132.7 × 96.9 × 82.9 mm (width × height × maximum depth); grip-to-monitor depth 72.8 mm.
Weight detailApproximately 572 g body only according to Sony Japan; 657 g with battery and memory card; lens excluded.Approximately 622 g body only; 713 g with battery and memory card; lens excluded.
MaterialsMagnesium-alloy covers and internal frame; dust- and moisture-resistant design, not a waterproof rating.–
In the boxPower cord, NP-FZ100 battery, cable protector, BC-QZ1 charger, shoulder strap, body cap, accessory shoe cap, eyepiece cup and USB Type-C cable, according to Sony UK.NP-SA100 battery, BC-SAD1 charger, cable clamper, shoulder strap, body cap, accessory shoe cap and eyepiece cup, according to Sony UK.

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