Busting the Lens dictates Focus Speed Myth

Started Mar 22, 2013 | Discussions thread
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Freneticburn Regular Member • Posts: 200
Re: Busting the Lens dictates Focus Speed Myth
1

You also have to take into account other factors like the design of the lens, the weight of the elements, etc.  Some lenses go through their distance range with a 90 degree twist while others take 180 degrees or more.  Usually your fast lenses, like 1.2 or 1.4, have the longer twist to fine tune focus better.

I think the lens most certainly determines AF speed but it goes further than if its just USM or not.

 Freneticburn's gear list:Freneticburn's gear list
Canon PowerShot SX260 HS Canon EOS 550D Canon EOS 6D Canon EF 50mm f/1.4 USM Canon EF 135mm f/2.0L USM +3 more
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