5DIII AF points with EF 70-300mm f/4-5.6 L USM

Started Sep 26, 2012 | Discussions thread
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Kmccarthy
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5DIII AF points with EF 70-300mm f/4-5.6 L USM
Sep 26, 2012

When I use my 24-105L I see all 41 cross points in my viewfinder (I only have cross points enabled). However, when I switch to my EF 70-300mm f/4-5.6 L USM, the left and right groups disappear and I only see the center group. If I enable all points, they show up, but the left and right groups are blinking, indicating they are not cross type.I think this must have to do with the fact that it is a slower lens, but this happens even when I'm at 70mm and F4.

Does anyone know anything about this?

Canon EOS 5D Mark III
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