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Could this be the reason we don't have a D400?

dm1dave

Lowden, US
13762 posts

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"RE: Could this be the reason we don't have a D400?"

dm1dave Administrator Awarded for high level knowledge and skills in various areas, most notably in Wildlife and Landscape Writer Ribbon awarded for his excellent article contributions to the Nikonians community Donor Ribbon awarded for his very generous support to the Fundraising Campaign 2015 Nikonian since 12th Sep 2006
Fri 21-Jun-13 05:30 PM

Neil makes a good point here...

“ Beyond all that, keep in mind that all AF engines work better at larger focal ratios. So if you have an f/5.6 sensor it will work better at f/4 than f/5.6. By extension, an f/8 sensor should work an f/5.6 configuration with more accuracy than an f/5.6 sensor because it is working well within its spec, and not at the edge at the absolute wall.”

I have seen this already with my D800 using the TC20E III on the 400/2.8. This combination results in a max aperture of f/5.6 but on the D300s the lens focus slowly. On the D800 the lens snaps into focus.

Also, the f/8 capable sensors will continue to operate in low light situations when the normal AF sensors begin to fail regardless of the lens used.

Dave Summers
Nikonians Photo Contest Director
My Nikonians Gallery | Current Nikonians Contests

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