What is Nikon referring to: cannot focus at F8 on a D7000

Started Sep 21, 2012 | Discussions thread
martinch
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Re: What is Nikon referring to: cannot focus at F8 on a D7000
In reply to Greg lamont, Sep 21, 2012

Greg lamont wrote:

Yes it's the same module, but there have been refinements, especially in terms of the sensitivity. With this camera you can focus at a combined aperture of F8, which isn't possible with the D7000.

Nikon only rate the autofocus system of the D7000/D300/etc to f/5.6 - that is, they believe it will focus fine with lenses which are f/5.6 (including light-loss compensation for teleconverters) or faster, but they do not guarantee that the autofocus will work reliably with slower lenses.

Having said this, autofocus works fine on my D200 & D300 when used with the f/6.7 300mm f/4 + TC-17E, and I've seen examples where a 2x converter was used with that lens...

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