http://www.dxomark.com/index.php/Publications/DxOMark-Reviews/Pentax-Prime-Lens-SeriesThe direct lens test pages for the pancakes are as follows:-SMC DA 15mm F4 ED AL LimitedSMC DA 21mm F3.2 AL LimitedSMC DA 40mm F2.8 Limited SMC DA 70mm F2.4 LimitedWell, the results of those wider lenses are not that good. I have the DA21 and 70 pancakes and would agree that resolution wise the DA21 is really
