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The Pentax K-5 II is the best APS-C camera ever test in DxO Mark Lab, the overall score of Pentax K-5 II is 82, even better than the Nikon D3200 DSLR.
From DxOMark Lab
The Pentax K-5 II is a remarkable piece of kit, it scores better in the DxO mark tests than several very highly thought of, full frame DSLRs, beating all the cameras made by Canon! It manages to do this in a body that is very reasonably priced. Add to this that you can fit lenses to the K-5 II that Pentax made as far back as 1975 and the multitude of independent lenses that are available and this camera becomes not only a remarkable performer but also a fantastically versatile camera at an exceptional price.
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Please read here,
http://forum.dxomark.com/index.php/topic,940.msg1855.html#msg1855