Testing a new lens here, the Pentax-M 35-70mm f2.8-3.5 varifocal. Very good glass indeed. If
shooting wide open and with heavy backlighting doesn't show a lot of lens flaws,
nothing will. Hardly any linear distortion, too!
Pentax K10D
,Pentax-M 5-70mm f2.8-3.5 varifocal 1/30s at f2.8, 50.0mm iso400
full exif