Sony Alpha 57

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

The Sony Alpha 57 (model name SLT-A57) is a Digital single-lens reflex camera that replaces 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

  • 16.1-megapixel Exmor™ CMOS sensor (4912 × 3264) [1]
  • 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)[2]
  • MPEG-4 video recording at 1440 × 1080 (approx. 25/30 fps @ 12 Mbit/s (average bit-rate),[3] 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

References

  1. ↑ official specifications
  2. ↑ NTSC official specifications
  3. ↑ PAL official specifications
Sensor 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
34 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234
Professional Full frame α900 α99 α99 II
α850
High-end APS-C DG-7D α700 α77 α77 II
Midrange α65 α68
Upper-entry α55 α57
α100 α550 α580 α58
DG-5D α500 α560
α450
Entry-level α33 α35 α37
α350 α380 α390
α300 α330
α200 α230 α290
Early models Minolta 7000 with SB-70/SB-70S (1986) · Minolta 9000 with SB-90/SB-90S (1986) (Still video SLRs)
Minolta MS-C1100 (1992) · Minolta RD-175 (1995)
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