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Sony Alpha 7 III vs Sony Alpha 9 III

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

Better figure, where one is clearly better

SonyAlpha 7 IIISonyAlpha 9 III
Overview
ReleasedMarch 2018January 2024
Image and sensor
Camera typeMirrorlessMirrorless
Sensor formatFull frameFull frame
Sensor typeBack-illuminated Exmor R CMOSStacked Exmor RS CMOS with global shutter
Sensor dimensions35.6 × 23.8 mm35.6 × 23.8 mm
Effective resolution24.2 MP24.6 MP
Largest image6000 × 40006000 × 4000
RAW recordingYesYes
Standard ISO range100–51200250–25600
Sensor detailApproximately 25.3 million total pixels; 3:2 back-illuminated sensor.Approximately 25.2 million total pixels; integral memory and global exposure rather than sequential line exposure.
Image formatsJPEG and Sony ARW 2.3 RAW, including uncompressed RAW. Sony's announcement limits compressed RAW continuous shooting to 12 bits; 14-bit output is not universal in every mode.JPEG, HEIF and Sony ARW 5.0 RAW.
ISO detailStandard still-image ISO 100–51200; expanded ISO 50–204800. Video ISO 100–51200 expands up to ISO 102400.Standard ISO 250–25600 for stills and movies; stills expand to ISO 125–51200.
Image processorBIONZ X with 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 693 phase-detection and 425 contrast-detection points; phase-detection covers approximately 93% of the image area. Eye AF supports continuous AF.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.
ShutterFocal-plane shutter; 30 seconds to 1/8000 second plus Bulb; electronic first curtain and silent electronic shooting.–
Burst detailUp to approximately 10 fps in Hi+ with AF/AE tracking using mechanical or silent shooting; approximately 8 fps in Hi with live view. Maximum speed depends on settings and lens compatibility. Silent shooting can distort moving subjects. Sony gives buffers of approximately 177 standard JPEG, 89 compressed RAW or 40 uncompressed RAW images under its UHS-II SDXC test conditions.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 image-sensor shift; Sony claims 5 stops under CIPA conditions for pitch/yaw with Planar T* FE 50mm F1.4 ZA and long-exposure noise reduction off. Correction depends on the lens.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/NTSC XAVC S 4K at 30p or 24p, approximately 100 or 60 Mbps; the UK PAL specification lists 25p. Full HD reaches 120p in NTSC modes. S-Log2, S-Log3 and HLG supported. Sony specifies different sensor readout at 24p and 30p; PhotographyBlog reports a 1.2× crop at 30p. Continuous recording is limited to approximately 29 minutes.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.
AudioBuilt-in stereo microphone; 3.5 mm microphone and headphone sockets.–
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3″3.2″
Screen dots921,6002,095,104
TouchscreenYesYes
Tilting screenYesYes
Display detailTFT screen tilts approximately 107° up and 41° down; touch focus is supported. Dots count colour subpixels.Four-axis LCD tilts and opens sideways; approximately 98° up, 40° down, 180° sideways and 270° rotation.
Viewfinder detail0.5-inch electronic viewfinder; 2,359,296 dots; 100% coverage and approximately 0.78× magnification with a 50 mm lens at infinity.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)710 photographs530 photographs
Body weight565 g617 g
Release detailSony Japan specifies 23 March 2018 for the ILCE-7M3 body and ILCE-7M3K kit, following its 27 February announcement; this is the Japanese sale date, not a UK release claim.Sony UK announced availability in January 2024; Japan's announcement specifies 26 January. The main date retains UK month precision.
Recording mediaTwo card slots; slot 1 supports UHS-I and UHS-II SD cards, while slot 2 supports UHS-I SD and compatible Memory Stick media.Both slots accept CFexpress Type A or UHS-I/UHS-II SD.
PortsUSB-C with USB 3.1 Gen 1, Multi/Micro USB, Micro HDMI, microphone and headphone sockets 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 802.11b/g/n at 2.4 GHz, Bluetooth 4.1 and NFC.Wi-Fi IEEE 802.11a/b/g/n/ac at 2.4/5 GHz and Bluetooth 5.0.
Battery life detailNP-FZ100; approximately 710 photographs with the monitor or 610 with the viewfinder under CIPA conditions.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.
ChargingUSB-C or Multi/Micro USB charging and power supply.–
DimensionsApproximately 126.9 × 95.6 × 73.7 mm maximum (width × height × depth); Sony also gives 62.7 mm from grip to monitor.Approximately 136.1 × 96.9 × 82.9 mm (width × height × maximum depth); grip-to-monitor depth 72.8 mm.
Weight detailApproximately 565 g body only; 650 g including 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 boxNP-FZ100 battery, AC adaptor AC-UUD12, shoulder strap, body cap, accessory shoe cap, eyepiece cup and Micro USB 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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