August 23, 2014, 01:50:37 PM

Author Topic: Sigma 35mm f/1.4  (Read 2204 times)


  • Canon EF 300mm f/2.8L IS II
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Re: Sigma 35mm f/1.4
« Reply #15 on: February 12, 2014, 06:55:39 AM »
Thank you all.
So the Sigma 35mm 1.4 seems to be a very popular lens, its just the focus is not alwasy perfect. It seems like a better option image quality wise that the canon from what i have read, also the price!

Ok can somone explain to me what this AFMA everyone is talking about? I see it mentioned a lot!

It's Auto Focus Micro Adjustment. It means every camera and lens are produced inside of certain tolerances regarding precision. But if you lens and body are focusing at the same end if that tolerance, it causes the focus to be in front or behind the point you focus on, a small mismatch. Newer camera bodies have the ability to adjust for this, to force the lens to focus where the camera body locks. This results in you getting sharp focus at the exact same spot the camera tells you when it shows focus is locked.
1dx, 24-70 L II, 50 Art, 200 f2.0 L