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( September 2012)
Sony α 57 Overview Type Digital single-lens translucent camera Lens Lens interchangeable, Sony A-mount Sensor/medium Sensor 23.5 mm × 15.6 mm, 16.1 effective megapixels CMOS ASA/ISO range Auto: 100-3200; Selectable: 100-16000; Multi Frame NR (up to ISO 25600) Storage Memory Stick PRO Duo™, Memory Stick PRO-HG Duo™, SD memory card, SDHC memory card, SDXC memory card Exposure/metering Exposure metering Advanced 1200-zone evaluative metering Metering modes Multi-segment, Center-weighted, Spot Flash Flash Built-in flash, Range: approx. 3' - 15' (1 m - 5 m); Auto, Fill-flash, Slow Sync., Rear Sync., Hi-speed sync., Red-eye reduction (on/off selectable for Autoflash and fill-flash mode), Wireless; Shutter Shutter electronically controlled, vertical-traverse, focal-plane Shutter Shutter speed range 30–1/4000 sec, with Bulb, 1/160 sec X-sync Continuous shooting up to 12 Frames Per Second Viewfinder Viewfinder 0.46" SVGA Xtra Fine EVF (2174 dpi) (Electronic viewfinder) (1,440,000 pixels), Diopter Adjustment: -4.0 to +3.0 m-1, Field of View: 100%, 1.04x magnification Image processing Custom WB Auto WB, Daylight, Shade, Cloudy, Incandescent, Fluorescent (Warm white/Cool white/Day white/Daylight), Flash, C. Temp 2500 to 9900 K, C Filter G7 to M7, 15-step, Custom, AWB micro adjustment General Rear LCD monitor 921k pixel 3-inch TFT LCD Battery InfoLITHIUM® NP-FM500H (7.2 V) Weight Approx. 618 g (with battery & media); Made in Thailand
Sony Alpha 57 (model name SLT-A57) is a Digital single-lens reflex camera that replaced the A55 in 2012. The camera features an electronic viewfinder and a translucent mirror. The main advantage of a translucent mirror is that it needn't flip up out of the way when taking a picture in order to expose the sensor, but the camera can focus and capture images simultaneously. The camera's 15-point autofocus system can be set to single, continuous or automatic and is arranged towards the centre. The 12 fps burst mode is available only in "speed priority" mode but can reach up to 5.5 fps burst rate in combination with any other settings.
Feature list [ edit ]
Exmor™ CMOS sensor (4912 × 3264)  Updated
BIONZ™ image processor ISO 100 - 16,000 (25,600 with multi-image combination)
Auto ISO 100 - 3200
Pull-out three-hinge tilt/swivel 921K dot TruBlack™ LCD screen
Stereo microphone and external mic socket
Dust shake sensor cleaning
second-generation Translucent Mirror Technology™
12 fps burst mode at full 8-megapixel resolution
Tru-Finder™ XGA electronic viewfinder with 1440K dots resolution with full 100% frame coverage.
AVCHD video recording at 1920 × 1080 (50p/60p ( 1080p) @ 28 Mbit/s, 50i/60i ( 1080i) @ 24 Mbit/s, 50i/60i ( 1080i) @ 17 Mbit/s, 25p/24p ( 1080p) @ 24 Mbit/s, 25p/24p ( 1080p) @ 17 Mbit/s, 25p/24p ( 1080p)) @ 12 Mbit/s) 
MPEG-4 video recording at 1440 × 1080 (approx. 25/30 fps @ 12 Mbit/s (average bit-rate), 640 x 480 (approx 25/30fps @ 3Mbit/s)  Live View with full-time Phase Detection AF
15-point autofocus sensors.
SteadyShot™ image stabilization system in body
3D Sweep Panorama™
Full tilt/swivel LCD screen
Multi-frame noise reduction
Object tracking AF
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