I have recently purchased the Sigma 35 1/4 and really like the lens. However I do notice some shots' focus is off (w/the 5D Mark II I use). I called Sigma's Service center and they said I could send it in w/my camera to have it looked at. I have never sent my lens/camera anywhere before and was wondering how many of you have done so and how safe it is to do so.
Any feed backs would be appreciated! Thanks!