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24-70/2.8 II L has a slight delay when auto-focusing, is it normal?

Started Aug 25, 2015 | Discussions thread
hotdog321
hotdog321 Forum Pro • Posts: 21,141
Re: 24-70/2.8 II L has a slight delay when auto-focusing, is it normal?

Abu Mahendra wrote:

It is the camera's extra sensitivity AF module kicking in. The reason you don't experience it with f/4 lenses is that the module is only activated at f/2.8 and brighter.

That's interesting. Focusing is more or less instant with my 5D III bodies. What is this AF module thingie? Genuine request for info--no snark. Sounds like it would actually be a drawback for photographers needing to work fast.

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 hotdog321's gear list:hotdog321's gear list
Canon EOS 5D Mark IV Canon EF 100mm f/2.8 Macro USM Canon EF 70-200mm F2.8L IS II USM Canon EF 24-70mm F2.8L II USM Canon EF 16-35mm F4L IS USM +3 more
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