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| 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 |
| Film speed | Auto: 100-3200; Selectable: 100-16000; Multi Frame NR (up to ISO 25600) |
| Storage media | 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 | |
| White balance | 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 | |
| LCD screen | 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 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.
