Sony Alpha 55
Sony α55|
SLT-A55V + SAL1680Z |
| Type |
Digital single-lens translucent camera |
|---|
| Sensor |
APS-C CMOS Sensor |
|---|
| Maximum resolution |
16.2 megapixels |
|---|
| Lens |
Interchangeable, A-mount |
|---|
| Flash |
GN 10 at ISO 100 |
|---|
| Shutter |
Electronically controlled, Vertical-traverse, Focal-plane Shutter |
|---|
| Shutter speed range |
30 – 1/4000 sec, bulb |
|---|
| ASA/ISO range |
ISO equivalency 100 to 12,800 in 1.0 EV steps, boost to 25,600 in Multi-Frame Noise Reduction mode |
|---|
| Exposure metering |
TTL full aperture exposure metering system
1200-zone evaluative |
|---|
| Exposure modes |
Programmed AE (AUTO, AUTO – Flash Off, P), Aperture priority, Shutter priority, Manual, Scene selection |
|---|
| Metering modes |
Multi-segment, Centre-weighted, Spot |
|---|
| Focus areas |
15-point (12 line, 3 cross) phase-detection AF system |
|---|
| Focus modes |
Single-shot AF, Automatic AF, Continuous AF, Manual Focus |
|---|
| Continuous shooting |
10 FPS / 6 FPS |
|---|
| Viewfinder |
EVF, 100% coverage, 1.10× magnification |
|---|
| Flash bracketing |
+` |
|---|
| Custom WB |
Auto / 6 presets / Colour Temperature/Colour Filter / Custom WB |
|---|
| Rear LCD monitor |
3.0" TFT LCD, 921k dot resolution, variable-angle tilt/swivel |
|---|
| Storage |
SD/SDHC/SDXC/Memory Stick Pro Duo |
|---|
| 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 |
|---|
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.
A-mount, APS-C CMOS sensor
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.
| 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 |
|
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