Sony SLT-A55 Digital Camera Review$899.99
Looking at the individual color channels, we found that the same pattern was consistent, so there is no one color that is adding more to the noise. Only the luminance channel was slightly higher than the others, but not significantly so. More on how we test noise.
The SLT-A55 offers a very impressive ISO range, going from 100 up to 12800, all at the full resolution of the camera. If you really need to push it further, the SLT-A55 offers a special ISO expansion mode that takes 6 shots for each shutter press and combining the images together to form a single image. This can widen the effective ISO range to 100 to an incredible 25600. However, moving objects can confuse the camera: see our Sample Photos for an example. All of the images below were shot in the standard, single shot mode.