We've carried out lab tests on the Pentax K-S2 across its full ISO range for resolution, noise (including signal to noise ratio) and dynamic range. We test the JPEGs shot by the camera, but we also check the performance with raw files. Most enthusiasts and pros prefer to shoot raw, and the results can often be quite different.
We've also picked out three of its chief rivals so that you can compare their performance directly.
• Canon 700D: Until the new EOS 750D and 760D become available, this is still Canon's top beginners camera.
• Nikon D5500: Nikon's most advanced beginners camera impressed us with its resolution.
• Olympus OM-D E-M5 II: It looks and handles just like a DSLR but it's actually a compact system camera.
Resolution test chart
We test camera resolution using an industry-standard ISO test chart that allows precise visual comparisons. For a full explanation of what our resolution charts mean, and how to read them, check out our camera resolution test process.
Pentax K-S2 resolution
JPEG analysis: The Nikon D5500 has a clear advantage over its rivals right up to ISO 3200, but the Pentax K-S2 and Olympus E-M5 II put in a good performance not far behind. The EOS 700D and its older sensor trail behind except at ISO 3200 and above.
Raw analysis: The K-S2's raw files show better detail than its JPEGs and it runs the Nikon D5500 a very close second. The E-M5 II is a little behind but it's still ahead of the EOS 700D.