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Agreed
In reply to rayman 2,
4 months ago
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rayman 2 wrote:
Mako2011 wrote:
I too just tested my D7000. If I point it at Blue sky (filling the frame) with AF-ON..AF-C..AF-Area mode "21pt" it hunts and will not lock. If I put a tree in the frame under the outer 6 arrays but center over blue sky...it hunts and will not lock. If I point it at the tree...it locks. Same in 39pt and 9pt. It would appear that the primary focus arrays must have a target to get initial lock. May be totally different for the D800/D4
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My opinions are my own and not those of DPR or its administration. They carry no 'special' value (except to me and Lacie of course)
no thats normal and common to all phase detect systems... that was normal 25 years ago in the F4
and is still normal today..
in that case the camera does not lock because its overshooting in both directions thats what you are seeing as hunting... something that is even worse in contrast detect systems...
In those cases you use something in the same distance as a target.. or go to manual focus...
AF is not failproof its just 30 x better then not having it at all !
BUT cross sensors are always better then non cross...
Peter
The you agree that Kerry Pierce's description of the AF-Area modes in inaccurate. I concur
--
My opinions are my own and not those of DPR or its administration. They carry no 'special' value (except to me and Lacie of course)
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