D500 Cross Sensor Limitations - Light or Physics?

[James Farrell]

I am not well versed in the science of all of this. That said, would the simple fact that we've never had a Nikon body with focus points so far away from the middle horizontally have something to do with this issue?

[Andy]

Sorry, I can't contribute to this particular question, beyond the observation that the D5 and D500 manuals list the same lenses. So it is sensor size invariant, only dependent on the AF module.


But these papers might be of interest for some. A few papers on AF systems and analysis:
http://graphics.stanford.edu/courses/cs178/applets/autofocusPD.html
http://www.falklumo.com/lumolabs/articles/k5focus/index.html
http://dougkerr.net/Pumpkin/articles/Split_Prism.pdf

rgds,
Andy