DoF may not exist...

Started 3 months ago | Discussions thread
JimKasson
MOD JimKasson Forum Pro • Posts: 35,338
Re: It is Science and Perception

DMillier wrote:

I suspect expectation plays a part.

You have pixel peeped so many ultra sharp GFX shots now, that maybe your brain can't accept even the most conservative CoC values.

I gave Greg a test to perform to see if using a conservative CoC worked. That was a year ago. He has not performed it. So we don’t know if a conservative CoC fits with his perception. It would be a useful experiment, and would probably go a long way towards getting to the bottom of this.

I also posted examples of low-CoC images, and asked Greg to look at them. He refused to do so.

Maybe it's a bit like aliasing. Lots of people seem to be completely unbothered by the most obvious luminance aliasing because they don't know what they are looking at. But once seen it can't be unseen.

Perhaps in your case, your brain is now so finally tuned to absolute sharpness that you can no longer tolerate a CoC that most people are fine with. When diffraction is doing the softening, perhaps it does so in a way that affects all the pixels everywhere by the same amount, so the tell-tale gradual fall-off of insufficient (for you) depth of field your brain latches on to is not present.

Just thinking about the "other things" that provide an explanation beyond the normal science.

You are a pixel peeper but it would be interesting to find out whether you see the same effect in prints.

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