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Sony Alpha 1 II vs Sony Alpha DSLR-A550

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

Better figure, where one is clearly better

SonyAlpha 1 IISonyAlpha DSLR-A550
Overview
ReleasedDecember 2024September 2009
Image and sensor
Camera typeMirrorlessDSLR
Sensor formatFull frameAPS-C
Sensor typeStacked Exmor RS CMOS with integral memoryExmor CMOS
Sensor dimensions35.9 × 24 mm23.4 × 15.6 mm
Effective resolution50.1 MP14.2 MP
Largest image8640 × 57604592 × 3056
RAW recordingYesYes
Standard ISO range100–32000200–12800
Sensor detailApproximately 50.5 million total pixels; Pixel Shift Multi Shooting uses four or 16 exposures combined in compatible computer software.Approximately 14.6 million total pixels; RGB primary-colour filter, charge protection coating and sensor-shift dust reduction
Image formatsJPEG, HEIF and Sony ARW 5.0 RAW.JPEG, RAW and RAW+JPEG; Sony ARW 2.1
ISO detailStandard ISO 100–32000 for stills and movies; stills expand to ISO 50–102400.–
Image processorBIONZ XR and dedicated AI processing unit.BIONZ
Lens and shooting
Lens mountSony E-mountSony A-mount
StabilisationSensor shiftSensor shift
Maximum continuous burst30 fps7 fps
Lens detail–Sony A-mount; operation confirmed with Minolta and Konica Minolta AF lenses
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.TTL phase detection with nine points; single, automatic and continuous AF, manual focus, predictive control and Eye-start AF. Face detection and Smile Shutter are available in Quick AF Live View.
Shutter–Electronically controlled focal-plane shutter; 30 seconds to 1/4000 second plus Bulb; flash sync 1/160 second
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 5 fps with optical viewfinder, or 4 fps in live view. Speed-priority shooting reaches 7 fps with focus and exposure locked at the first frame. Normal continuous buffer: approximately 32 Fine JPEG, 14 RAW or seven RAW+JPEG frames, depending on conditions and media.
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.SteadyShot INSIDE sensor shift; Sony claims approximately 2.5–4 stops, depending on lens and conditions.
Flash–Automatic pop-up flash; guide number 12 m at ISO 100; ADI and pre-flash TTL; proprietary Alpha flash shoe
Exposure controls–Program, aperture priority, shutter priority, manual and scene modes; 40-segment honeycomb metering with optical finder, 1,200-zone metering in Quick AF Live View. Auto HDR combines two exposures for JPEG still subjects.
Video
Highest video resolution7680 × 4320 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.No movie recording; HDMI supports still-image playback.
Screen and viewfinder
ViewfinderElectronicOptical
Screen size3.2″3″
Screen dots2,095,104921,600
TouchscreenYesNo
Tilting screenYesYes
Display detailFour-axis TFT LCD opens approximately 98° up, 40° down and 180° sideways, with 270° rotation when opened sideways.Xtra Fine LCD tilts 90° up and down. Quick AF Live View uses a dedicated sensor with 90% coverage; Manual Focus Check Live View uses the main sensor with 100% coverage and 7×/14× magnification.
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.Pentamirror; approximately 95% coverage and 0.80× magnification with a 50 mm lens at infinity, −1 m⁻¹.
Connections and design
Wi-FiYes–
BluetoothYes–
Battery life (maker's claim)520 photographs950 photographs
Body weight658 g599 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 Hong Kong specifies September 2009 availability. Sony Japan revised its local sale date to 5 November 2009; that later regional release is not used as the first-sale date. No September sale day is given.
Recording mediaBoth slots accept CFexpress 2.0 Type A or UHS-I/UHS-II SD.SD, SDHC, Memory Stick PRO Duo and PRO-HG Duo; card selection uses a manual switch.
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.USB 2.0 Hi-Speed, mini HDMI Type C, remote release terminal and Alpha accessory shoe
Wireless connectionsWi-Fi IEEE 802.11a/b/g/n/ac at 2.4/5 GHz and Bluetooth 5.0.–
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-FM500H; approximately 950 shots using optical viewfinder or 480 in live view, under CIPA conditions.
Charging–Supplied BC-VM10 battery charger; optional AC-VQ900AM adapter/charger or AC-PW10AM adapter
DimensionsApproximately 136.1 × 96.9 × 82.9 mm (width × height × maximum depth); grip-to-monitor depth 72.8 mm.Approximately 137 × 104 × 84 mm (width × height × depth), excluding projections.
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.Approximately 599 g body only, excluding battery, memory card and accessories.
Colours–Black
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.–

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