[feenster]

Hi folks,
I have a Sigma 18-125mm for my 350D. I bought it used from Jessops last June. I am finding more and more that I am not happy with the pictures it produces - they just aren't any way near as clear and *nice* as from my 50mm. I know they are 2 different types of lenses, and I shouldn't expect miracles from the Sigma, but I have read about a lot of people who praise it for its sharpness etc.

Is it possible to send a lens back to Sigma under warranty for them to re-calibrate it or some such thing? I may be grasping at straws, but i'm sure it should be performing better than it is. Anyone sent a lens back?

Matt