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Sony Alpha 7R IV vs Sony Alpha 9 III

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

Better figure, where one is clearly better

SonyAlpha 7R IVSonyAlpha 9 III
Overview
ReleasedSeptember 2019January 2024
Image and sensor
Camera typeMirrorlessMirrorless
Sensor formatFull frameFull frame
Sensor typeBack-illuminated Exmor R CMOSStacked Exmor RS CMOS with global shutter
Sensor dimensions35.7 × 23.8 mm35.6 × 23.8 mm
Effective resolution61 MP24.6 MP
Largest image9504 × 63366000 × 4000
RAW recordingYesYes
Standard ISO range100–32000250–25600
Sensor detailApproximately 62.5 million total pixels; 3:2 sensor. Pixel Shift Multi Shooting combines 16 exposures into a 19008 × 12672 image using Imaging Edge on a computer; requires a stationary camera and subject. This is separate from the normal single-shot resolution.Approximately 25.2 million total pixels; integral memory and global exposure rather than sequential line exposure.
Image formatsJPEG, RAW and RAW+JPEG; Sony ARW 2.3 compressed or uncompressed RAW.JPEG, HEIF and Sony ARW 5.0 RAW.
ISO detailStandard still-image ISO 100–32000; expanded ISO 50–102400.Standard ISO 250–25600 for stills and movies; stills expand to ISO 125–51200.
Image processorBIONZ X and front-end LSI.BIONZ XR with dedicated AI processing unit.
Lens and shooting
Lens mountSony E-mountSony E-mount
StabilisationSensor shiftSensor shift
Maximum continuous burst10 fps120 fps
AutofocusFast Hybrid AF with 567 full-frame phase-detection points and 425 contrast points; phase points cover approximately 74% of the image. Real-time tracking and human/animal Eye AF for stills; human Eye AF in movies. APS-C point counts differ.Up to 759 still-image or 627 movie phase-detection points; sensitivity EV −5 to 20 with an F2 lens at ISO 100 equivalent. Current UK specification includes automatic subject selection and people, animals, birds, insects, cars, trains and aircraft; launch reviews precede later firmware enhancements.
Burst detailUp to approximately 10 fps in Hi+ with AF/AE tracking; approximately 8 fps in Hi. Sony lists 68 compressed RAW or 30 uncompressed RAW frames under its test conditions. Speed and buffer depend on settings and lens; some lenses need firmware updates.Up to 120 fps full-resolution electronic bursts with AF/AE tracking under Sony test conditions; speed depends on lens compatibility and shooting settings. Pre-Capture retains up to one second before full shutter press. No mechanical shutter.
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.Five-axis sensor shift; 8.0-stop CIPA pitch/yaw claim with FE 50mm F1.2 GM and long-exposure noise reduction off. Active and Dynamic Active movie modes supported.
Video
Highest video resolution3840 × 2160 at 30 fps3840 × 2160 at 120 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 uses full-pixel readout without binning with a narrower field of view; 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.Up to uncropped 3840 × 2160 120p NTSC or 100p PAL; 4K 60p uses 6K oversampling. Supports 10-bit 4:2:2, S-Log3 and S-Cinetone; All-Intra 4K tops out at 60p. External HDMI RAW output is separate from internal recording.
AudioStereo microphone; 3.5 mm microphone and headphone sockets. Multi Interface Shoe supports digital audio with compatible accessories.–
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3″3.2″
Screen dots1,440,0002,095,104
TouchscreenYesYes
Tilting screenYesYes
Display detailTFT LCD tilts approximately 107° up and 41° down; touch focus and touchpad operation. Original ILCE-7RM4 has 1,440,000 dots; the later ILCE-7RM4A has a different display.Four-axis LCD tilts and opens sideways; approximately 98° up, 40° down, 180° sideways and 270° rotation.
Viewfinder detail0.5-inch electronic viewfinder with 5,760,000 dots, 100% coverage and approximately 0.78× magnification; selectable 60/120 fps display.0.64-inch Quad-XGA OLED with 9437184 dots and approximately 0.90× magnification with a 50 mm lens at infinity; selectable up to 240 fps NTSC or 200 fps PAL.
Connections and design
Wi-FiYesYes
BluetoothYesYes
Battery life (maker's claim)670 photographs530 photographs
Body weight580 g617 g
Release detailSony Japan specifies 6 September 2019 for ILCE-7RM4; this is the Japanese on-sale date, not a UK release claim. July reservations preceded sale.Sony UK announced availability in January 2024; Japan's announcement specifies 26 January. The main date retains UK month precision.
Recording mediaTwo SD/SDHC/SDXC slots, both supporting UHS-II; simultaneous, relay and separate-media recording.Both slots accept CFexpress Type A or UHS-I/UHS-II SD.
PortsUSB Type-C, Multi/Micro USB, Micro HDMI, microphone and headphone sockets, sync terminal and Multi Interface Shoe.USB Type-C at 10 Gbps, Multi/Micro USB, full-size HDMI, 1000BASE-T Ethernet, sync terminal, 3.5 mm microphone and headphone sockets and digital-audio Multi Interface Shoe.
Wireless connectionsWi-Fi IEEE 802.11a/b/g/n/ac at 2.4/5 GHz, NFC and Bluetooth smartphone connection.Wi-Fi IEEE 802.11a/b/g/n/ac at 2.4/5 GHz and Bluetooth 5.0.
Battery life detailNP-FZ100; CIPA approximately 670 photographs with LCD or 530 with viewfinder; USB charging and power supported.NP-FZ100; Sony UK CIPA approximately 530 photographs with LCD or 400 with viewfinder. Japan lists 520/410 respectively. USB Type-C Power Delivery charging and power supported.
DimensionsApproximately 128.9 × 96.4 × 77.5 mm (width × height × maximum depth); grip-to-monitor depth 67.3 mm.Approximately 136.1 × 96.9 × 82.9 mm (width × height × maximum depth); grip-to-monitor depth 72.8 mm.
Weight detailApproximately 580 g body only; 665 g with battery and memory card; lens excluded.Sony UK specifies approximately 617 g body only or 702 g with battery and memory card; Japan specifies 618/703 g respectively. Main figures use the UK specification.
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.NP-FZ100 battery, BC-QZ1 charger, power cord, cable protector, shoulder strap, body cap, accessory shoe cap and eyepiece cup, according to Sony UK.

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