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

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

Better figure, where one is clearly better

SonyAlpha 7R IIISonyAlpha 7R III (ILCE-7RM3A)
Overview
ReleasedNovember 2017June 2021
Image and sensor
Camera typeMirrorlessMirrorless
Sensor formatFull frameFull frame
Sensor typeBack-illuminated Exmor R CMOSBack-illuminated Exmor R CMOS
Sensor dimensions35.9 × 24 mm35.9 × 24 mm
Effective resolution42.4 MP42.4 MP
Largest image7952 × 53047952 × 5304
RAW recordingYesYes
Standard ISO range100–32000100–32000
Sensor detailApproximately 43.6 million total pixels; 3:2 back-illuminated sensor without an optical low-pass filter. Pixel Shift Multi Shooting combines four exposures into a 7952 × 5304 output, not a higher pixel-count still image; requires a static camera/subject and computer processing.Approximately 43.6 million total pixels; 3:2 sensor. Pixel Shift Multi Shooting combines four shifted exposures, requiring a static camera/subject and computer processing.
Image formatsJPEG, RAW and RAW+JPEG; Sony ARW 2.3, compressed or uncompressed RAW. Maker launch footnote limits compressed RAW continuous shooting, Bulb and long-exposure noise reduction to 12-bit output; other supported modes allow 14-bit.JPEG, RAW and RAW+JPEG; Sony ARW 2.3, including uncompressed RAW.
ISO detailStandard still-image ISO 100–32000; expanded ISO 50–102400.Standard still-image ISO 100–32000; expanded ISO 50–102400.
Image processorBIONZ X and front-end LSI.BIONZ X and front-end LSI.
Lens and shooting
Lens mountSony E-mountSony E-mount
StabilisationSensor shiftSensor shift
Maximum continuous burst10 fps10 fps
AutofocusFast Hybrid AF with 399 full-frame phase-detection points and 425 contrast points; Eye AF supported. Phase-point coverage differs with APS-C lenses and crop modes.Fast 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.
ShutterFocal-plane shutter; 30 seconds to 1/8000 second plus Bulb; flash sync 1/250 second. Electronic first curtain and silent shooting supported.Focal-plane shutter; 30 seconds to 1/8000 second plus Bulb; flash sync 1/250 second. Electronic first curtain and silent shooting supported.
Burst detailUp to approximately 10 fps in Hi+ with AF/AE tracking using mechanical or silent shutter; up to approximately 8 fps with live view in Hi. Maker buffer claims 76 compressed RAW/JPEG or 28 uncompressed RAW frames under Sony test conditions with UHS-II SDXC; actual speed depends on settings and lens compatibility.Up 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.
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 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.
Video
Highest video resolution3840 × 2160 at 30 fps3840 × 2160 at 30 fps
Video detailJapanese specification lists XAVC S 4K at 30p or 24p and up to 100 Mbps; headline maximum reflects Japanese/NTSC mode. Super 35mm recording provides full-pixel readout without binning; full-frame 4K is a separate mode. HLG, S-Log2 and S-Log3; 8-bit 4:2:2 HDMI output. Full HD 120p is a lower-resolution mode.4K 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.
AudioStereo microphone; 3.5 mm microphone and headphone sockets.Stereo microphone; 3.5 mm microphone and headphone sockets.
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3″3″
Screen dots1,440,0002,359,296
TouchscreenYesYes
Tilting screenYesYes
Display detailTFT LCD tilts approximately 107° up and 41° down; touch focus/touchpad operation supported. This is the original ILCE-7RM3's 1,440,000-dot panel, not the later ILCE-7RM3A display.This 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.
Viewfinder detail0.5-inch electronic viewfinder with 3,686,400 dots, 100% coverage and approximately 0.78× magnification with a 50 mm lens at infinity; selectable 60/120 fps display.0.5-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.
Connections and design
Wi-FiYesYes
Bluetooth–Yes
Battery life (maker's claim)650 photographs640 photographs
Body weight572 g572 g
Release detailSony Japan specifies 25 November 2017 for the ILCE-7RM3 body; this is the Japanese sale date, not a UK release claim. Reservations began earlier and are not the release date.Sony 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.
Recording mediaTwo media slots; slot 1 supports UHS-II SD, while the other supports SD/Memory Stick. Simultaneous, relay and separate-media recording supported.Two media slots; one UHS-II-compatible SD slot and one SD/Memory Stick slot. Simultaneous and relay recording supported.
PortsUSB Type-C with SuperSpeed USB 3.1 Gen 1, Multi/Micro USB, Micro HDMI, microphone and headphone sockets, sync terminal and Multi Interface Shoe.USB Type-C with SuperSpeed USB 5 Gbps, Multi/Micro USB, Micro HDMI, microphone and headphone sockets, sync terminal and Multi Interface Shoe.
Wireless connectionsWi-Fi IEEE 802.11b/g/n at 2.4 GHz and NFC.Wi-Fi IEEE 802.11b/g/n at 2.4 GHz, NFC and Bluetooth 4.1.
Battery life detailNP-FZ100; CIPA approximately 650 photographs using the LCD or 530 using the viewfinder. In-camera charging and power via USB Type-C or Multi/Micro USB.NP-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.
DimensionsApproximately 126.9 × 95.6 × 73.7 mm (width × height × maximum depth); grip-to-monitor depth 62.7 mm.Approximately 126.9 × 95.6 × 73.7 mm (width × height × maximum depth); grip-to-monitor depth 62.7 mm.
Weight detailApproximately 572 g body only; 657 g with battery and memory card; lens excluded.Approximately 572 g body only according to Sony Japan; 657 g with battery and memory card; lens excluded.
MaterialsMagnesium-alloy body; dust- and moisture-resistant design does not guarantee protection against ingress.Magnesium-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 Japan.Power 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.

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