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Sony Alpha 1 II vs Sony Alpha 9

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

Better figure, where one is clearly better

SonyAlpha 1 IISonyAlpha 9
Overview
ReleasedDecember 2024May 2017
Image and sensor
Camera typeMirrorlessMirrorless
Sensor formatFull frameFull frame
Sensor typeStacked Exmor RS CMOS with integral memoryBack-illuminated stacked Exmor RS CMOS
Sensor dimensions35.9 × 24 mm35.6 × 23.8 mm
Effective resolution50.1 MP24.2 MP
Largest image8640 × 57606000 × 4000
RAW recordingYesYes
Standard ISO range100–32000100–51200
Sensor detailApproximately 50.5 million total pixels; Pixel Shift Multi Shooting uses four or 16 exposures combined in compatible computer software.Approximately 28.3 million total pixels; stacked sensor with integral memory and backside illumination.
Image formatsJPEG, HEIF and Sony ARW 5.0 RAW.JPEG, RAW and RAW+JPEG; Sony ARW 2.3 compressed or uncompressed RAW.
ISO detailStandard ISO 100–32000 for stills and movies; stills expand to ISO 50–102400.Mechanical-shutter stills use standard ISO 100–51200, expandable to 50–204800. Electronic-shutter stills use ISO 100–25600 with expanded ISO 50. Movie ISO 100–51200, expandable to 102400.
Image processorBIONZ XR and dedicated AI processing unit.BIONZ X with front-end LSI.
Lens and shooting
Lens mountSony E-mountSony E-mount
StabilisationSensor shiftSensor shift
Maximum continuous burst30 fps20 fps
AutofocusUp to 759 phase-detection points for stills and movies; sensitivity EV −4 to 20 in AF-S with an F2 lens at ISO 100. Automatic or selected recognition of people, animals, birds, insects, cars, trains and aircraft. Sony's current feature page specifies Real-time Recognition AF+ from firmware version 4.00; launch reviews describe earlier firmware.Current Sony specification lists 693 full-frame phase-detection points and 425 contrast-detection points; contrast points increased from 25 through firmware. Phase coverage approximately 93%; sensitivity EV −3 to 20 with an F2 lens at ISO 100. Current features include Real-time Tracking and Eye AF; launch reviews describe earlier firmware.
Burst detailUp to 30 fps electronic Hi+ with AF/AE tracking under compatible-lens and maker conditions; uncompressed or lossless-compressed RAW up to 20 fps; mechanical Hi+ up to 10 fps. Pre-Capture retains up to one second before full shutter press, subject to camera temperature and shooting conditions. A custom button can temporarily change burst speed.Up to 20 fps electronic Hi with AF/AE tracking under Sony's supported-lens and exposure conditions; up to 12 fps with uncompressed RAW, or 5 fps mechanical. Maker buffer claim is 241 compressed RAW or 362 JPEG frames using a UHS-II card under its stated test conditions.
Stabilisation detailFive-axis sensor shift; centre 8.5 stops and periphery 7.0 stops under CIPA 2024 pitch/yaw/roll conditions with FE 50mm F1.2 GM and long-exposure noise reduction off. Active and Dynamic Active movie modes narrow the field of view and are unavailable in 8K or at frame rates of 120 fps or higher.Five-axis sensor shift; Sony claims 5.0 stops under CIPA pitch/yaw conditions with Planar T* FE 50mm F1.4 ZA and long-exposure noise reduction off.
Video
Highest video resolution7680 × 4320 at 30 fps3840 × 2160 at 30 fps
Video detailSony's current feature page lists internal 7680 × 4320 30p XAVC HS with 8.6K oversampling and 10-bit 4:2:2 support. Lower-resolution 4K up to 120p has approximately 10% crop; Full HD 240 fps is lower resolution. S-Log3, S-Cinetone and imported LUTs supported; external HDMI RAW is separate from internal recording.XAVC S 3840 × 2160 at 30p/24p in NTSC mode or 25p PAL, up to 100 Mbps; Full HD 120p NTSC or 100p PAL is lower resolution. HDMI supports 8-bit 4:2:2 output. No video picture profiles or S-Log.
Audio–Built-in stereo microphone; 3.5 mm stereo microphone and headphone sockets; compatible Multi Interface Shoe audio accessories.
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3.2″3″
Screen dots2,095,1041,440,000
TouchscreenYesYes
Tilting screenYesYes
Display detailFour-axis TFT LCD opens approximately 98° up, 40° down and 180° sideways, with 270° rotation when opened sideways.Rear TFT LCD tilts approximately 107° upwards and 41° downwards.
Viewfinder detail0.64-inch Quad-XGA OLED with 9437184 dots and approximately 0.90× magnification with a 50 mm lens at infinity. Selectable 60/120/240 fps; standard magnification is unavailable at 240 fps.0.5-inch Quad-VGA OLED, 3686400 dots, 100% coverage and approximately 0.78× magnification with a 50 mm lens at infinity; selectable 60/120 fps display.
Connections and design
Wi-FiYesYes
BluetoothYesYes
Battery life (maker's claim)520 photographs650 photographs
Body weight658 g588 g
Release detailSony UK specifies availability in December 2024; no release day inferred. Exact technical figures use Sony Japan because the UK specification URLs were inaccessible during research.Sony Japan lists 26 May 2017 for ILCE-9; this is the Japanese first-sale date, not a UK release claim.
Recording mediaBoth slots accept CFexpress 2.0 Type A or UHS-I/UHS-II SD.Slot 1 accepts UHS-I/UHS-II SD; slot 2 accepts UHS-I SD or Memory Stick Duo. Simultaneous and separate-format recording supported.
PortsUSB Type-C at 10 Gbps, Multi/Micro USB, full-size HDMI, 2.5GBASE-T Ethernet, sync terminal, 3.5 mm microphone and headphone sockets and digital-audio Multi Interface Shoe.Multi/Micro USB, Micro HDMI Type D, wired LAN, sync terminal, 3.5 mm microphone and headphone sockets and Multi Interface Shoe.
Wireless connectionsWi-Fi IEEE 802.11a/b/g/n/ac at 2.4/5 GHz and Bluetooth 5.0.Wi-Fi IEEE 802.11b/g/n at 2.4 GHz; Bluetooth 4.1 and NFC; smartphone location linkage supported.
Battery life detailNP-FZ100; Sony Japan CIPA approximately 520 photographs with LCD or 420 with viewfinder. PhotographyBlog's 530/400 figures are not used. USB Type-C Power Delivery charging and power supported.NP-FZ100; CIPA approximately 650 photographs with LCD or 480 with viewfinder; USB charging and power supported.
DimensionsApproximately 136.1 × 96.9 × 82.9 mm (width × height × maximum depth); grip-to-monitor depth 72.8 mm.Approximately 126.9 × 95.6 × 73.7 mm (width × height × maximum depth); grip-to-monitor depth 63.0 mm.
Weight detailApproximately 658 g body only or 743 g with battery and memory card, excluding lens. PhotographyBlog's inconsistent 617 g figure is not used.Sony Japan specifies approximately 588 g body only or 673 g with battery and memory card, excluding lens. The UK page labels 588 g as including battery/card, conflicting with the explicit Japanese split.
In the boxOne NP-FZ100 battery, BC-ZD1 dual-battery charger, cable protector, shoulder strap, body cap, accessory shoe cap and FDA-EP19/FDA-EP21 eyepiece cups, according to Sony Japan. USB Power Delivery AC adaptor and USB cable are not included.NP-FZ100 battery, BC-QZ1 charger, power cord, cable protector, AC-UUE12 AC adaptor, shoulder strap, body cap, accessory shoe cap, eyepiece cup and Micro USB cable, according to Sony UK.

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