DP a99 studio samples

The problem is, if we don't look at noise, there are probably no improvements in IQ other than higher DR.

According to a test in a German photo magazine (Colorfoto), resolution at low ISO is a little less on the A99 compared to A850/A900. Granted, it's probably not the most sophisticated of magazines, but such as result actually was to be expected since the SLT mirror is known to slightly reduce resolution.