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From Wikipedia, the free encyclopedia

Sony α 57
Sony SLT-A57 with SAL35F18.JPG
Overview
TypeDigital single-lens translucent camera
Lens
Lensinterchangeable, Sony A-mount
Sensor/medium
Sensor23.5 mm × 15.6 mm, 16.1 effective megapixels CMOS
Film speedAuto: 100-3200; Selectable: 100-16000; Multi Frame NR (up to ISO 25600)
Storage mediaMemory Stick PRO Duo™, Memory Stick PRO-HG Duo™, SD memory card, SDHC memory card, SDXC memory card
Exposure/metering
Exposure meteringAdvanced 1200-zone evaluative metering
Metering modesMulti-segment, Center-weighted, Spot
Flash
FlashBuilt-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
Shutterelectronically controlled, vertical-traverse, focal-plane Shutter
Shutter speed range30–1/4000 sec, with Bulb, 1/160 sec X-sync
Continuous shootingup to 12 Frames Per Second
Viewfinder
Viewfinder0.46" 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
White balanceAuto 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
LCD screen921k pixel 3-inch TFT LCD
BatteryInfoLITHIUM® NP-FM500H (7.2 V)
WeightApprox. 618 g (with battery & media);
Made inThailand

The 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.

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Transcription

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

External links

This page was last edited on 29 December 2018, at 14:56
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