Sampling theory doesn't make digital cameras work.
Why do you turn it the other way round. Let me repeat: digital cameras work, and don't conflict with the mentioned theory. More than that, it's exactly that theory that's used, amongst others, in designing them.
It might predict something about the quality of the image that comes out of one. All I ever see are statements made that relate to resolution which is only one part of image quality.
This was about image reconstruction from samples, what the theory says about it, and how you can do some simple checking of it. If Tom had any other intention than trying to insult me, he could probably enlighten you on the differences between prints made from same film frame, on same paper, with same lens and same processing, using diffusion vs. collimated head, and also with "critical" focus vs. out of focus lens adjustments.
So far, the only strong correlation that I've seen is that very experienced, knowledgeable film photographers, who have gone to digital, like digital more than people who don't know anything but theory which may, or may not apply.
This does not conflict with the mentioned theory in any way. It's about adequacy of a certain workflow to certain situations. The digital one fits very well for some purposes.
cheers, caveman
