Diffraction Limit Discussion Continuation

Started Feb 21, 2014 | Discussions thread
Great Bustard Forum Pro • Posts: 40,846
I suppose...

Steen Bay wrote:

bobn2 wrote:

Where your methodology falls flat is that the 'experiment' you're performing is fictitious, it's not based on real numbers, nor is it based on the theory.

A real world experiment could be to shoot at f-stops from wide open to f/22 with for example 5D and D800 (using a good lens, the same if possible) , and see at which f-stop the diffraction starts to be 'clearly visible' at 100% view. My guess is that the resolution limiting effect of diffraction will become visible at a larger aperture on D800.

...the first thing we'd need to do is define "clearly visible".  The fact of the matter is that the aperture of max resolution will be the same, regardless of pixel count, all else equal, but that resolution would fall off more quickly with the higher MP photo, although it will always be more detailed.

The question, then, is how does the term "diffraction limited" fit into all this?  Everything points to the term not fitting into it at all.

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