Lens Advice

Started Apr 9, 2010 | Discussions thread
TimR32225
Veteran MemberPosts: 3,030Gear list
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Re: maximum aperture
In reply to bcemail, Apr 12, 2010

Keep in mind that all lenses autofocus at their maximum aperture no matter what aperture you have set on the camera. The camera then stops down the aperture to whatever you've set it at when it flips up the mirror to release the shutter.

So faster lenses will give you a faster and possibly more accurate focus if they are f2.8 or brighter. So even though you may not shoot a lens wide open, it can still give you faster and possibly more accurate focus, depending on what camera you are using and the particulars of that cameras a/f points. Just thought I'd mention that in case you hadn't considered it.

Good Luck
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Canon EOS 7D Canon EOS-1D Mark IV Canon EOS-1D X Canon EF 300mm f/2.8L IS USM Canon EF 500mm f/4.0L IS USM +11 more
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