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.
Feature list
* 16.1-megapixel
Exmor
Exmor is the name of a technology Sony implemented on some of their CMOS image sensors. It performs on-chip analog/digital signal conversion and two-step noise reduction in parallel on each column of the CMOS sensor.
Exmor RS is the world's ...
™ CMOS sensor (4912 × 3264)
* Updated
BIONZ
BIONZ is a line of image processors used in Sony digital cameras.
It is currently used in many Sony α DSLR and mirrorless cameras. Image processing in the camera converts the raw data from a CCD or CMOS image sensor into the format that is st ...
™ 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
AVCHD (Advanced Video Coding High Definition) is a file-based format for the digital recording and playback of high-definition video. It is H.264 and Dolby AC-3 packaged into the MPEG transport stream, with a set of constraints designed around t ...
video recording at 1920 × 1080 (50p/60p (
1080p
1080p (1920×1080 progressively displayed pixels; also known as Full HD or FHD, and BT.709) is a set of HDTV high-definition video modes characterized by 1,920 pixels displayed across the screen horizontally and 1,080 pixels down the screen ve ...
) @ 28 Mbit/s, 50i/60i (
1080i
1080i (also known as Full HD or BT.709) is a combination of frame resolution and scan type. 1080i is used in high-definition television (HDTV) and high-definition video. The number "1080" refers to the number of horizontal lines on the scre ...
) @ 24 Mbit/s, 50i/60i (
1080i
1080i (also known as Full HD or BT.709) is a combination of frame resolution and scan type. 1080i is used in high-definition television (HDTV) and high-definition video. The number "1080" refers to the number of horizontal lines on the scre ...
) @ 17 Mbit/s, 25p/24p (
1080p
1080p (1920×1080 progressively displayed pixels; also known as Full HD or FHD, and BT.709) is a set of HDTV high-definition video modes characterized by 1,920 pixels displayed across the screen horizontally and 1,080 pixels down the screen ve ...
) @ 24 Mbit/s, 25p/24p (
1080p
1080p (1920×1080 progressively displayed pixels; also known as Full HD or FHD, and BT.709) is a set of HDTV high-definition video modes characterized by 1,920 pixels displayed across the screen horizontally and 1,080 pixels down the screen ve ...
) @ 17 Mbit/s, 25p/24p (
1080p
1080p (1920×1080 progressively displayed pixels; also known as Full HD or FHD, and BT.709) is a set of HDTV high-definition video modes characterized by 1,920 pixels displayed across the screen horizontally and 1,080 pixels down the screen ve ...
)) @ 12 Mbit/s)
*
MPEG-4 video recording at 1440 × 1080 (approx. 25/30 fps @ 12 Mbit/s (average bit-rate),
PAL official specifications
/ref> 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
Sony Store listing of camera
{{DEFAULTSORT:Sony Alpha 57
57
Live-preview digital cameras
Cameras introduced in 2012