Sony Alpha A77 review

As part of our image quality testing fo the Sony Alpha 77, we've shot our resolution chart with a Sigma 50mm f/1.4 EX DG HSM lens mounted.

If you view our crops of the resolution chart's central section at 100% (or Actual Pixels) you will see that, for example, at ISO 100 the Sony Alpha 77 is capable of resolving up to around 28 (line widths per picture height x100) in its highest quality JPEG files. Although the resolution lines are clearly distinguishable there is, however, some disruption from about 24 LW/PH x100 onwards.

For a full explanation of what our resolution charts mean, and how to read them please take a look at the resolution charts article.

Examining images of the chart taken at each sensitivity setting reveals the following resolution scores in line widths per picture height x100:

ISO 50, score: 28 (see full image)

JPEG Images

ISO 100, score: 28 (see full image)

ISO 200, score: 28 (see full image)

ISO 400, score: 26 (see full image)

ISO 800, score: 26 (see full image)

ISO 1600, score: 24 (see full image)

ISO 3200, score: 24 (see full image)

ISO 6400, score: 22 (see full image)

ISO 12800, score: 20 (see full image)

ISO 16000, score: 20 (see full image)

Raw images

ISO 50, score: 28 (see full image)

ISO 100, score: 28 (see full image)

ISO 200, score: 28 (see full image)

ISO 400, score: 26 (see full image)

ISO 800, score: 24 (see full image)

ISO 1600, score: 24 (see full image)

ISO 3200, score: 24 (see full image)

ISO 6400, score: 22 (see full image)

ISO 12800, score: 20 (see full image)

ISO 16000, score: 20 (see full image)