Canon 300mm f2.8 Lens pre focus

Started Aug 28, 2012 | Discussions thread
bronxbombers
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baseball example:
In reply to David Brett, Aug 29, 2012

David Brett wrote:

Hi,

Can anybody help me understand how to use the pre focus buttons on an Canon 300mm f2.8 Lens? An explanation in nice easy language would be good or, point me in the direction of a user manual.

Thank you in anticipation!

David

one scenario, a runner on first base, he might try to steal and dive back to first but maybe you also want to be ready for some infield action so you have the focus set on second base say in case the batter hits it to like 2nd or short but then maybe the pitcher tries to pick off the guy at first and if you pre-focused on that, just a flick of the ring and you are instantly focused back on first base and in time to catch the dive into first without suffering AF lag that misses the play

all sorts of scenarios like that

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