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Sony Alpha 9 III vs Sony Alpha SLT-A99

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

Better figure, where one is clearly better

SonyAlpha 9 IIISonyAlpha SLT-A99
Overview
ReleasedJanuary 2024October 2012
Image and sensor
Camera typeMirrorlessTranslucent mirror
Sensor formatFull frameFull frame
Sensor typeStacked Exmor RS CMOS with global shutterExmor CMOS
Sensor dimensions35.6 × 23.8 mm35.8 × 23.9 mm
Effective resolution24.6 MP24.3 MP
Largest image6000 × 40006000 × 4000
RAW recordingYesYes
Standard ISO range250–25600100–25600
Sensor detailApproximately 25.2 million total pixels; integral memory and global exposure rather than sequential line exposure.24.7 million total photosites; fixed translucent mirror directs light to the dedicated phase-detection AF module while the main sensor supplies live view
Image formatsJPEG, HEIF and Sony ARW 5.0 RAW.JPEG including Extra Fine, 14-bit RAW (Sony ARW 2.3) and RAW+JPEG; 3:2 or 16:9 stills; no 3D panorama
ISO detailStandard ISO 250–25600 for stills and movies; stills expand to ISO 125–51200.Standard ISO 100–25600; expanded ISO 50, 64 and 80; multi-frame noise reduction ISO 100–51200; movie sensitivity ISO 100–6400 or Auto ISO 100–3200
Image processorBIONZ XR with dedicated AI processing unit.BIONZ with front-end LSI
Lens and shooting
Lens mountSony E-mountSony A-mount
StabilisationSensor shiftSensor shift
Maximum continuous burst120 fps6 fps
Lens detail–Sony, Minolta and Konica Minolta A-mount AF lenses; APS-C crop mode available; kit lenses are separate from body specifications
AutofocusUp 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.19 dedicated phase-detection points including 11 cross sensors, with 102 on-sensor assist points; AF-D and assist points require supported lenses and firmware. AF-S, AF-A, AF-C, AF-D, direct manual and manual focus; AF range limiter and AF micro-adjustment; EV −1–18 at ISO 100 with an F2.8 lens
Shutter–1/8000–30 seconds and Bulb; flash sync 1/250 second; selectable electronic first curtain; maker-tested approximately 200,000 shutter operations
Burst detailUp 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.Full-frame continuous shooting up to 6 fps, APS-C up to 7 fps, or 2.5 fps Lo. Tele-zoom Continuous Advance Priority AE offers 8 fps at approximately 10 MP or 10 fps at approximately 4.6 MP; 10 fps is JPEG only. With UHS-I SD and ISO 320 or lower, or high-ISO noise reduction off, full-frame Hi buffer is 15 Extra Fine, 24 Fine or 29 Standard JPEGs, 15 RAW or 12 RAW+JPEG; Auto ISO with normal noise reduction reduces this to 11/12/12/10/8 frames respectively
Stabilisation detailFive-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.SteadyShot INSIDE sensor shift for stills, maker claim approximately 2.5–4.5 stops; electronic stabilisation for movies
Flash–No built-in flash; compatible external flash uses ADI or pre-flash TTL; Multi Interface Shoe, with supplied ADP-MAA adapter for Auto-lock accessories
Exposure controls–PASM, automatic, scene, panorama and tele-zoom continuous AE modes; 1200-zone metering; ±5 EV exposure compensation in 1/3 or 1/2 steps; D-Range Optimizer and Auto HDR
Video
Highest video resolution3840 × 2160 at 120 fps1920 × 1080 at 60 fps
Video detailUp 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.Japan/NTSC: Full HD AVCHD 2.0 at 60p/28 Mbps, 60i/24 or 17 Mbps, and 24p/24 or 17 Mbps; MP4 up to 1440 × 1080 at 30 fps. A/S/M movie exposure requires manual focus; continuous phase-detection AF uses automatic exposure. Clean uncompressed HDMI output can operate alongside internal recording; recording limit approximately 29 minutes or 2 GB per file
Audio–Built-in stereo microphone, external stereo microphone input, headphone output, adjustable audio recording level and level display; mono playback speaker
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3.2″3″
Screen dots2,095,1041,228,800
TouchscreenYesNo
Tilting screenYesYes
Display detailFour-axis LCD tilts and opens sideways; approximately 98° up, 40° down, 180° sideways and 270° rotation.Three-axis WhiteMagic RGBW LCD tilts 140° upwards or 180° forwards and rotates 180° right or 90° left; 1,228,800 dots count colour subpixels; separate top status LCD
Viewfinder detail0.64-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.0.5-type XGA OLED Tru-Finder with 2,359,296 dots, 100% coverage and approximately 0.71× magnification with a 50 mm lens; focus peaking and magnification
Connections and design
Wi-FiYesNo
BluetoothYes–
Battery life (maker's claim)530 photographs410 photographs
Body weight617 g733 g
Release detailSony UK announced availability in January 2024; Japan's announcement specifies 26 January. The main date retains UK month precision.Sony Korea announced late-October 2012 retail availability; Sony Japan specifies 26 October 2012. October is the earliest maker-stated on-sale precision read
Recording mediaBoth slots accept CFexpress Type A or UHS-I/UHS-II SD.Two SD/SDHC/SDXC slots with UHS-I support; one also accepts Memory Stick PRO Duo/PRO-HG Duo; simultaneous backup and RAW/JPEG separation available
PortsUSB 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.USB 2.0 mini-B, mini HDMI Type C, 3.5 mm microphone and headphone sockets, remote, DC input and flash sync terminal; Multi Interface Shoe
Wireless connectionsWi-Fi IEEE 802.11a/b/g/n/ac at 2.4/5 GHz and Bluetooth 5.0.SLT-A99V incorporates GPS geotagging; Japanese specification and photograph represent this regional model
Battery life detailNP-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.NP-FM500H; CIPA maker claim approximately 410 photographs with the viewfinder or 500 with the LCD; optional VG-C99AM grip holds two additional batteries
Charging–Supplied BC-VM10A external charger
DimensionsApproximately 136.1 × 96.9 × 82.9 mm (width × height × maximum depth); grip-to-monitor depth 72.8 mm.Approximately 147 × 111.2 × 78.4 mm (width × height × depth), excluding protrusions
Weight detailSony 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.Approximately 733 g body only; 812 g including battery and Memory Stick PRO Duo
Materials–Magnesium-alloy body with dust and moisture resistance measures; complete resistance is not guaranteed
Colours–Black
In the boxNP-FZ100 battery, BC-QZ1 charger, power cord, cable protector, shoulder strap, body cap, accessory shoe cap and eyepiece cup, according to Sony UK.NP-FM500H battery, BC-VM10A charger, USB cable, ADP-MAA shoe adapter, accessory shoe cap, shoulder strap, body cap, eyepiece cup and software CD

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