Sony Alpha 55
The Sony α55 (model variants SLT-A55V with GPS, SLT-A55 without GPS depending on country) is a midrange-level SLT camera, released in August 2010.
 SLT-A55V + SAL1680Z | |
| Overview | |
|---|---|
| Type | Digital single-lens translucent camera |
| Lens | |
| Lens | Interchangeable, A-mount |
| Sensor/medium | |
| Sensor | APS-C CMOS Sensor |
| Maximum resolution | 16.2 megapixels |
| ASA/ISO range | ISO equivalency 100 to 12,800 in 1.0 EV steps, boost to 25,600 in Multi-Frame Noise Reduction mode |
| Storage | SD/SDHC/SDXC/Memory Stick Pro Duo |
| Focusing | |
| Focus modes | Single-shot AF, Automatic AF, Continuous AF, Manual Focus |
| Focus areas | 15-point (12 line, 3 cross) phase-detection AF system |
| Exposure/metering | |
| Exposure modes | Programmed AE (AUTO, AUTO – Flash Off, P), Aperture priority, Shutter priority, Manual, Scene selection |
| Exposure metering | TTL full aperture exposure metering system 1200-zone evaluative |
| Metering modes | Multi-segment, Centre-weighted, Spot |
| Flash | |
| Flash | GN 10 at ISO 100 |
| Flash bracketing | +` |
| Shutter | |
| Shutter | Electronically controlled, Vertical-traverse, Focal-plane Shutter |
| Shutter speed range | 30 – 1/4000 sec, bulb |
| Continuous shooting | 10 FPS / 6 FPS |
| Viewfinder | |
| Viewfinder | EVF, 100% coverage, 1.10× magnification |
| Image processing | |
| Custom WB | Auto / 6 presets / Colour Temperature/Colour Filter / Custom WB |
| General | |
| Rear LCD monitor | 3.0" TFT LCD, 921k dot resolution, variable-angle tilt/swivel |
| Battery | NP-FW50 Lithium-ion battery rechargeable battery |
| Optional battery packs | Unavailable |
| Dimensions | 124 × 92 × 85 mm |
| Weight | 441 g (15.6 oz) |
| Made in | Thailand |
| Footnotes | |
| dpreview | |
Its design is novel due to its being the first digital single-lens translucent camera (SLT), along with the Sony α33. As an SLT it employs a semi-transparent mirror instead of an opaque mirror, which enables phase detection autofocus in live view.
The design also replaces the optical viewfinder present in conventional DSLR with a high-resolution electronic viewfinder. The translucent mirror is fixed in position so does not have to flip up to take a still image, enabling rapid continuous shots of up to 10 frames per second. The static mirror also eliminates "mirror slap", the noise produced by the movement of the mirror during a shutter actuation, making the A55 quieter than standard DSLRs.
The A55 is one of the first four Sony Alpha DSLR / SLT cameras with video mode included, capable of 1080i. It is also capable of shooting 1080p at 30fps. The SLT design means that it is capable of using phase-detection autofocus during video recording. It has body-integrated image stabilization, and a 16.2 MPx APS-C CMOS sensor.
The camera's body-integrated image stabilization produces heat, causing the camera to stop video recording after these recording times:
| Model name | Ambient temperature | Image Stabilization | |
|---|---|---|---|
| On | Off | ||
| α55 (SLT-A55V) | 20 °C (68 °F) | 9 min | Approx. 29 minutes |
| 30 °C (86 °F) | 6 min | 13 minutes | |
| 40 °C (104 °F) | 3 min | 5 minutes | |
| α33 (SLT-A33) | 20 °C (68 °F) | 11 min | Approx. 29 minutes |
| 30 °C (86 °F) | 7 min | Approx. 22 minutes | |
| 40 °C (104 °F) | 4 min | 9 minutes | |
Features
- Konica Minolta A-mount lens bayonet.
Video
- AVCHD 1080 50i or 60i (depending on region)
- MPEG-4 1080 30p or 25p (depending on region)[1]
External links
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