I have a smooth finish 50mm Sigma f1.4 and it exhibited the focus pattern that Roger at Lens Rentals discusses, in that I could AFMA it to work from about 5-20 feet but either side of that would front/back focus.
I sent it to Sigma USA, they got it back to me in a week with a firmware update and this thing now is spot on at any distance. Good job Sigma! You probably just sold me one of your new 35 and maybe an 85 as a result.
I sent it to Sigma USA, they got it back to me in a week with a firmware update and this thing now is spot on at any distance. Good job Sigma! You probably just sold me one of your new 35 and maybe an 85 as a result.