Originally posted by NeilS Have a problem with front focusing on a Sigma 24-70mm lens. Tried to use the AF Fine Adjustment function but could see no difference. Any suggestions?
Curious. I have major issues with this lens on my K3 and K5IIs. I sent it back to Sigma under warranty and they reported they calibrated it.
Still didn't work properly. FFAs didn't help much pre or post calibration. I could get it to focus better within certain ranges, and then it would be off in others. Pretty much I gave up on the lens and moved on. Sigma wouldn't have anything else to do with it unless I sent my bodies in with the lens and being in my busy season I could not do that. By the time I could I was out of warranty.
Fast forward to the K-1, and I decided to give the lens another try. It has been spot on with no FFAs and gets a lot of use now.
Seems these lenses have some issues.