[Brightcolours]

You are right in that 512nm is still in the green spectrum, I remembered the ranges wrong. It sits already very close to cyan though.

I am unfamiliar with the term air images... Sorry for that, can you explain what it means?



Regardless of what colour 512nm is, monochromatic light says very little about when you start to see diffraction taking its toll resolution wise in normal visible spectrum (white) light, though. With a 5D mk II for instance, you already see less resolution at f8 when you measure with black/white targets in normal light spectrum (see the dpreview tests for instance).







And that is at a pixel pitch of 6.4µm, twice that of the pixel pitch you stated for the Nikkor 1 10mp sensor?



And I still am puzzled about the very high numbers you mention (400 lp/mm)... As far as I know, the better normal photographic lenses (for DSLRs) reach a bit above 100 lp/mm. Very specialized lenses like my ultra micro nikkor 55mm f2 can reach much higher, but only for monochromatic light (e-line, a green), only in a very limited image circle (12mm with that lens) and only at a specified magnification level (1:4, object distance 218.18mm). And then still it only reaches 500 lp/mm, with monochromatic light, and that 12mm image circle. At f2.

And this very specialized lens is then diffraction limited at f4.