Yikes! The rumored Nikon D800.

Started Oct 5, 2011 | Discussions thread
John Sheehy Forum Pro • Posts: 20,902
Re: What happened to the Nyquist Frequency?

Dylthedog wrote:

Great Bustard wrote:

Getting right to the point, a FF version of the 7D sensor would be 46 MP. So, however well FF lenses fare on the 7D is how well they'd fare on a 46 MP FF sensor.

DPR used to show lens reviews with the Nyquist Frequency marked and sited the 1DsIII as the sensor resolving benchmark; from memory many lenses only out-resolved it in the centre. Moving to 36MP I can see only a few lenses hitting that mark in the very sweetest of spots.

Maybe I missed something because it's no longer marked on the reviews; was proven to be incorrect?

You did miss something; the fact that a lens has measurably lower contrast at frequency X in the corners of the image, does not mean that there is no usable information at frequency 2x or even 3x, in the corners. That is the fallacious assumption that most of these gloom-and-doom brick-wall prophesies rely upon, and we see it also in discussions of diffraction.

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