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

Started Sep 26, 2012 | Discussions thread
Kmccarthy
Regular MemberPosts: 131
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Re: 5DIII AF points with EF 70-300mm f/4-5.6 L USM
In reply to billythek, Sep 27, 2012

billythek wrote:

Kmccarthy wrote:

Well, you are in Group E. Be thankful you are not if F,G, or H. You CAN autofocus with all 61 points, but the outer points are only sensitive to horizontal lines.

I realize you can focus with all 61. The problem is that only the center 21 are reliable cross types. If I wanted to focus with unreliable outer points, I would have kept my 5DII !

That darn 7D! Looks like you are right, all its points are cross-type at f/5.6. Whereas on the 5D3 and 1DX, the 20 "semi-outer" points are only cross-type at f/4. I guess the 7D wins one battle. I'm glad my lenses are all f/4 or faster.

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  • Bill

The 7D really was a great camera in every way, except the sensor. If the 6D had been a 7D with a full frame sensor for $2K, that would have been the ideal camera for me.

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