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Sony Alpha SLT-A33 vs Sony Alpha SLT-A77

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

Better figure, where one is clearly better

SonyAlpha SLT-A33SonyAlpha SLT-A77
Overview
ReleasedSeptember 2010September 2011
Image and sensor
Camera typeTranslucent mirrorTranslucent mirror
Sensor formatAPS-CAPS-C
Sensor typeExmor APS HD CMOSExmor APS HD CMOS
Sensor dimensions23.4 × 15.6 mm23.5 × 15.6 mm
Effective resolution14.2 MP24.3 MP
Largest image4592 × 30566000 × 4000
RAW recordingYesYes
Standard ISO range100–12800100–16000
Sensor detail14.6 million total photosites; fixed translucent mirror directs light to a separate phase-detection AF sensor while the main sensor supplies live view24.7 million total photosites; fixed translucent mirror feeds a dedicated phase-detection AF sensor while the main sensor supplies live view
Image formatsJPEG, RAW (Sony ARW 2.2) and RAW+JPEG; 3:2 or 16:9 stills; Sweep Panorama and 3D MPO panorama recordingJPEG, RAW (Sony ARW 2.3), RAW+JPEG and 3D MPO panoramas; 3:2 or 16:9 stills
ISO detailAuto ISO 100–1600; multi-frame noise reduction extends sensitivity to ISO 25600; movie Auto ISO 100–1600Auto ISO 100–12800 with adjustable limits; expanded ISO 50; multi-frame noise reduction ISO 100–25600; main ISO range excludes expansion
Image processorBIONZBIONZ
Lens and shooting
Lens mountSony A-mountSony A-mount
StabilisationSensor shiftSensor shift
Maximum continuous burst7 fps12 fps
Lens detailCompatible Sony, Minolta and Konica Minolta A-mount AF lenses; kit lenses are separate from body specificationsCompatible Sony, Minolta and Konica Minolta A-mount AF lenses; kit lenses are separate from body specifications
Autofocus15-point phase-detection AF with three cross sensors; EV −1–18 at ISO 100; single-shot, automatic and continuous AF, manual focus and Eye-Start AF19-point phase-detection AF with 11 cross sensors; EV −1–18 at ISO 100 with an F2.8 lens; AF-S, AF-A, AF-C, direct manual and manual focus; tracking AF and built-in LED assist
Shutter1/4000–30 seconds and Bulb; flash sync 1/160 second1/8000–30 seconds and Bulb; flash sync 1/250 second; selectable electronic first curtain; maker-rated approximately 150,000 shutter operations
Burst detailUp to 7 fps in Continuous Advance Priority AE, with focus and exposure adjusted during AF-C according to the maker manual; AF-S fixes focus to the first frame. Ordinary continuous drive reaches 6 fps; its maker buffer figures are 16 Fine JPEG, 20 Standard JPEG, seven RAW or seven RAW+JPEG frames. PhotographyBlog's exposure-lock description conflicts with the manual.Up to 12 fps at full resolution in Continuous Advance Priority AE with continuous phase-detection AF; ordinary drive 8 fps Hi or 3 fps Lo. Maker buffer claim at 12 fps: 13 Extra Fine JPEG, 17 Fine/Standard JPEG, 13 RAW or 11 RAW+JPEG frames; ordinary drive reaches 18 Fine/Standard JPEG frames. Performance depends on card and shooting conditions.
Stabilisation detailSteadyShot INSIDE sensor-shift system; maker claim approximately 2.5–4 stops depending on lens and conditionsSteadyShot INSIDE sensor shift for stills, maker claim approximately 2.5–4.5 stops; electronic stabilisation for movies
FlashAutomatic pop-up flash, guide number 10 in metres at ISO 100; ADI and pre-flash TTL control; compatible external flash required for wireless flash and high-speed syncAutomatic pop-up flash, guide number 12 in metres at ISO 100; ADI, pre-flash TTL and manual output; ±3 EV flash compensation; external compatible flash required for wireless and high-speed sync
Exposure controlsPASM, Auto, Auto+, scene, panorama and Continuous Advance Priority AE modes; 1200-zone main-sensor metering; ±2 EV compensation in 1/3 steps; D-Range Optimizer and three-frame Auto HDRPASM, Auto, Auto+, scene, panorama and memory-recall modes; 1200-zone metering; ±5 EV exposure compensation in 1/3 or 1/2 steps; three-frame Auto HDR, D-Range Optimizer and Picture Effects
Video
Highest video resolution1920 × 1080 at 29.97 fps1920 × 1080 at 60 fps
Video detailJapan/NTSC specification is 1920 × 1080 AVCHD at 59.94 interlaced fields/s from 29.97 sensor frames/s, approximately 17 Mbps; PAL bodies use 50i from 25 frames/s. MP4 supports 1440 × 1080 and VGA. At 20°C Sony claims approximately 11 minutes of continuous recording with SteadyShot enabled or 29 minutes disabled; higher temperatures shorten this further.Japan/NTSC model: 1920 × 1080 AVCHD 2.0 at 60p/28 Mbps, 60i/24 or 17 Mbps, and 24p/24 or 17 Mbps; PAL models use 50p, 50i and 25p. MP4 supports 1440 × 1080 or VGA. P/A/S/M movie exposure modes require manual focus; continuous phase-detection AF is available with automatic movie exposure.
AudioBuilt-in stereo microphone, mono playback speaker and external microphone inputBuilt-in stereo microphone with wind-noise reduction, external stereo microphone input and mono playback speaker
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3″3″
Screen dots921,600921,600
Touchscreen–No
Tilting screenYesYes
Display detailXtra Fine TruBlack LCD; 180° tilt and 270° rotation on a bottom hinge; dots count colour subpixelsThree-axis articulating LCD: 150° upwards, 180° forwards, then rotation 180° right or 90° left; 921,600 dots count colour subpixels; focus peaking and magnification; separate top status LCD
Viewfinder detailElectronic finder with approximately 100% coverage, 1.10× magnification with a 50 mm lens, and 1,152,000 effective equivalent dots out of 1,440,000 total; electronic level and grid display0.5-type XGA OLED Tru-Finder with 2,359,296 dots, 100% coverage and approximately 1.09× magnification with a 50 mm lens; focus magnification and electronic level
Connections and design
Battery life (maker's claim)270 photographs470 photographs
Body weight433 g653 g
Release detailSony's US announcement specifies September 2010 retail availability; Sony Japan specifies 10 September 2010. The month is the earliest maker-stated precision found across regions.Sony China announced staggered availability from mid-September 2011; the UK announcement specifies October 2011; Sony Japan specifies 14 October 2011. September is the earliest maker-stated retail precision read.
Recording mediaSingle slot accepting SD, SDHC, SDXC, Memory Stick PRO Duo and PRO-HG DuoSingle slot accepting SD/SDHC/SDXC (UHS-I supported), Memory Stick PRO Duo and PRO-HG Duo
PortsUSB 2.0 Hi-Speed, mini HDMI Type C, external microphone input and wired remote terminal; optional infrared remote and AC adaptorUSB 2.0 Hi-Speed, mini HDMI Type C, 3.5 mm stereo microphone input, wired remote, DC input and flash sync terminal; Auto-lock accessory shoe and optional infrared remote
Wireless connections–GPS geotagging is built into the SLT-A77V regional model represented by the Japanese specification and photograph.
Battery life detailNP-FW50; CIPA maker claim approximately 270 photographs using the viewfinder or 340 using the LCDNP-FM500H; CIPA maker claim approximately 470 photographs using the viewfinder or 530 using the LCD
ChargingSupplied BC-VW1 external battery chargerSupplied BC-VM10A external charger
DimensionsApproximately 124.4 × 92 × 84.7 mm (width × height × depth)Approximately 142.6 × 104 × 80.9 mm (width × height × depth), excluding protrusions
Weight detailApproximately 433 g body only; 492 g including battery and Memory Stick PRO DuoApproximately 653 g body only; 732 g including battery and Memory Stick PRO Duo
Materials–Magnesium-alloy body with dust and moisture resistance measures; Sony does not guarantee complete resistance in all conditions
ColoursBlackBlack
In the boxNP-FW50 battery, BC-VW1 charger, USB cable, shoulder strap, caps and software CD; kit lenses depend on configurationNP-FM500H battery, BC-VM10A charger, shoulder strap, eyepiece cup, USB cable and software CD; lenses depend on kit

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