Busting the Lens dictates Focus Speed Myth

Started Mar 22, 2013 | Discussions thread
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Scott Larson
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Re: Busting the Lens dictates Focus Speed Myth
In reply to MAC, Mar 25, 2013

MAC wrote:

Sovern wrote:

The 85L supposedly AF's noticeably slower than my 85 1.8 according to the lens "gurus". But I don't believe it.

The L is slower. But it can track people fine in AIServo.

Lens speed comes into play in action photography and AI Servo. That is where the 70-200 F2.8's for sports shine.

The cameras can compensate for the slower focus but the frame rate slows down. For kicks I tried shooting basketball with the 85mm f1.2. Yeah, it tracked but the frame rate on my 1D Mark IV went from "clickclickclickclick" to "click........click.......click.......".

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Canon EOS-1D Mark III Canon EOS 5D Canon EOS 5D Mark II Canon EOS-1D Mark IV Canon EF 50mm f/1.4 USM +11 more
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