After me, the optics of my Sony A200 has very disappointed (dull and blurred images) I was after a thorough search for the Sigma 17-70mm entschieden.Eine decision I does not make absolutely bereue.Mit this lens my Sony really very good pictures. Contrast and little distortion, color realistic. More you can not expect for your money really. It is a pity that is installed with the Sony connector no HSM. These optics deserves 5 stars for performance and value for money.