Rahul Sharma (Editor)

Sony Alpha 57

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Sony Alpha 57

Type
  
Digital single-lens translucent camera

Lens
  
interchangeable, Sony A-mount

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
  
Advanced 1200-zone evaluative metering

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)
  • 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

    • References

    Sony Alpha 57 Wikipedia
    (Text) CC BY-SA


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