The Sony Alpha 57 (model name SLT-A57) is a
Digital single-lens reflex camera
A digital single-lens reflex camera (digital SLR or DSLR) is a digital camera that combines the optics and mechanisms of a single-lens reflex camera with a solid-state image sensor and digitally records the images from the sensor.
The reflex des ...
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™ 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
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 sc ...
) @ 28 Mbit/s, 50i/60i (
1080i
In high-definition television (HDTV) and video display technology, 1080i is a video display format with 1080 lines of vertical resolution and Interlaced video, interlaced scanning method. This format was once a standard in HDTV. It was particular ...
) @ 24 Mbit/s, 50i/60i (
1080i
In high-definition television (HDTV) and video display technology, 1080i is a video display format with 1080 lines of vertical resolution and Interlaced video, interlaced scanning method. This format was once a standard in HDTV. It was particular ...
) @ 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 sc ...
) @ 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 sc ...
) @ 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 sc ...
)) @ 12 Mbit/s)
*
MPEG-4
MPEG-4 is a group of international standards for the compression of digital audio and visual data, multimedia systems, and file storage formats. It was originally introduced in late 1998 as a group of audio and video coding formats and related ...
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