| I recently bought one of these for my K10D (and 20D) and had to return it twice because the lens front focused so badly, on both cameras. I could correct it partially with the K20D but not enough.
Both of my cameras work perfectly with all my other Pentax lenses (DA*300, DA18-250, FA50 f1.7 and 28mm f2.8). So I know the 70-200 was the problem. I finally exchanged it for a DA*50-135mm.
When the Sigma 70-200 was stopped down it was nice and sharp (still a slight FF but DOF made it acceptable) I really hated sending this lens back because it has great potential, but I was disappointed with it being defective.
Maybe others have had better luck with this than I had.
Getting the 50-135 Monday and hope it is a good copy. |