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Sony Alpha SLT-A37 vs Sony Alpha SLT-A99

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

Better figure, where one is clearly better

SonyAlpha SLT-A37SonyAlpha SLT-A99
Overview
ReleasedMay 2012October 2012
Image and sensor
Camera typeTranslucent mirrorTranslucent mirror
Sensor formatAPS-CFull frame
Sensor typeExmor APS HD CMOSExmor CMOS
Sensor dimensions23.5 × 15.6 mm35.8 × 23.9 mm
Effective resolution16.1 MP24.3 MP
Largest image4912 × 32646000 × 4000
RAW recordingYesYes
Standard ISO range100–16000100–25600
Sensor detail16.5 million total photosites; fixed translucent mirror feeds the dedicated phase-detection AF module while the main sensor supplies live view24.7 million total photosites; fixed translucent mirror directs light to the dedicated phase-detection AF module while the main sensor supplies live view
Image formatsJPEG, RAW (Sony ARW 2.3), RAW+JPEG and 3D panorama MPO; 3:2 or 16:9 stillsJPEG including Extra Fine, 14-bit RAW (Sony ARW 2.3) and RAW+JPEG; 3:2 or 16:9 stills; no 3D panorama
ISO detailAuto ISO 100–3200; standard ISO 100–16000; multi-frame noise reduction extends to ISO 25600; movies ISO 100–3200Standard 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 processorBIONZBIONZ with front-end LSI
Lens and shooting
Lens mountSony A-mountSony A-mount
StabilisationSensor shiftSensor shift
Maximum continuous burst5.5 fps6 fps
Lens detailSony, Minolta and Konica Minolta A-mount AF lenses; kit lenses are separate from body specificationsSony, Minolta and Konica Minolta A-mount AF lenses; APS-C crop mode available; kit lenses are separate from body specifications
Autofocus15 phase-detection points including three cross sensors; AF-S, AF-A, AF-C and manual focus; EV −1–18 at ISO 100 with an F2.8 lens; zone/local selection, tracking AF and flash AF assist19 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
Shutter1/4000–30 seconds and Bulb; flash sync 1/160 second; electronic first curtain selectable1/8000–30 seconds and Bulb; flash sync 1/250 second; selectable electronic first curtain; maker-tested approximately 200,000 shutter operations
Burst detailFull-resolution continuous shooting up to 5.5 fps Hi or 2.5 fps Lo; Tele-zoom Continuous Advance Priority AE reaches 7 fps with central crop to 8.4 MP JPEG. Maker ordinary Hi buffer: 15 Fine or 16 Standard JPEG, seven RAW or six RAW+JPEG; cropped mode 17 Fine or 18 Standard JPEG. Performance depends on card and shooting conditionsFull-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 detailSteadyShot INSIDE sensor shift for stills, maker claim approximately 2.5–4 stops; electronic stabilisation for moviesSteadyShot INSIDE sensor shift for stills, maker claim approximately 2.5–4.5 stops; electronic stabilisation for movies
FlashAutomatic pop-up flash, guide number 10 metres at ISO 100; ADI/pre-flash TTL; compatible external flash required for wireless and high-speed syncNo 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 controlsPASM, Intelligent Auto, Superior Auto, scene and panorama modes; 1200-zone metering; ±3 EV compensation in 1/3 steps; D-Range Optimizer, Auto HDR, Picture Effects and Auto Portrait FramingPASM, 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 resolution1920 × 1080 at 30 fps1920 × 1080 at 60 fps
Video detailJapan/NTSC configuration: Full HD AVCHD 2.0 at 60 interlaced fields per second with 30 fps sensor output, or 24p, at approximately 24 or 17 Mbps. PAL models use 50i with 25 fps sensor output or 25p. No 50p/60p Full HD. MP4 up to 1440 × 1080 at 30 fps; main rate is sensor output, not interlaced field rate. Maker continuous limit approximately 29 minutes or 2 GB. Movie A/S/M exposure requires manual focus; phase-detection AF uses automatic exposureJapan/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
AudioBuilt-in stereo microphone and mono playback speaker; external microphone inputBuilt-in stereo microphone, external stereo microphone input, headphone output, adjustable audio recording level and level display; mono playback speaker
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size2.7″3″
Screen dots230,4001,228,800
TouchscreenNoNo
Tilting screenYesYes
Display detailClear Photo LCD tilts approximately 135° upwards or 55° downwards; dots count colour subpixels; focus peaking and magnificationThree-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 detail0.46-type SVGA Tru-Finder, 100% coverage; 1,440,000 effective dots at maximum magnification (1.19× with 50 mm lens), or 1,253,280 at standard magnification (1.09×)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-Fi–No
Battery life (maker's claim)450 photographs410 photographs
Body weight448 g733 g
Release detailSony Spain states availability from mid-May 2012; Sony Japan states 15 June 2012. May follows the earliest maker-stated regional retail timingSony Korea announced late-October 2012 retail availability; Sony Japan specifies 26 October 2012. October is the earliest maker-stated on-sale precision read
Recording mediaSingle slot accepting SD/SDHC/SDXC, Memory Stick PRO Duo and PRO-HG DuoTwo 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 2.0 Hi-Speed, mini HDMI Type C, 3.5 mm microphone and wired remote inputs; Auto-lock accessory shoe; no infrared remoteUSB 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 connections–SLT-A99V incorporates GPS geotagging; Japanese specification and photograph represent this regional model
Battery life detailNP-FW50; maker CIPA claim approximately 450 photographs with viewfinder or 500 with LCDNP-FM500H; CIPA maker claim approximately 410 photographs with the viewfinder or 500 with the LCD; optional VG-C99AM grip holds two additional batteries
ChargingSupplied BC-VW1 external charger; no in-body chargingSupplied BC-VM10A external charger
DimensionsApproximately 124.4 × 92 × 84.7 mm (width × height × depth), excluding protrusionsApproximately 147 × 111.2 × 78.4 mm (width × height × depth), excluding protrusions
Weight detailApproximately 448 g body only, 506 g including battery and Memory Stick PRO DuoApproximately 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
ColoursBlackBlack
In the boxNP-FW50 battery, BC-VW1 charger, shoulder strap, body cap, eyepiece cup, USB cable and software CD; lenses depend on kitNP-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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