DoF may not exist...

Started 3 months ago | Discussions thread
Greg7579
Greg7579 Forum Pro • Posts: 14,041
Re: It is Science and Perception

JimKasson wrote:

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.

Jim, I have no idea what you are talking about.  What images did I refuse to look at?  And the test you keep talking about makes no sense to me.  Explain it to me again.  I go to a football field and shoot at ten targets and then compare them to what?  I never understood it.  But I'll do it when I get home if it is doable.  But I'm not posting any comparison images.

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