First attempt at focus stacking C&C required

[Craigie]

Beautiful result for a first trial

Thanks a lot Jean.

[Craigie]

Beautiful result for a first trial

Thanks Jean.

[tclune]

That's ["Depth perception is partly the result of distant objects being less well defined"] true in a two-dimensional object such as a photograph but not when a three-dimensional scene such as this one is viewed by the human eye.

This doesn't pass the smell test for me. While it is true that with a photograph you can focus on the unfocused areas, which you can't do with 3D scenes, it is my sense that the degree of sharpness of focus is very much part of our visual processing of depth information with 3D. Do you have a reputable source that might be readily available for your counter-intuitive statement? TIA

[DanK]

The human eye sees everything in focus, so I don't understand that matching how we see means intentionally limiting the depth of field.

No it doesn't. Try focusing on a page of writing 8 inches/ 20cm away from your eye while holding another 2 ft/ 60 cm away. The one farther away will be way out of focus.

[Mike Buckley]

Do you have a reputable source that might be readily available for your counter-intuitive statement?

Nope. I remember reading that information often when I got into photography in the early 1980s.

Try focusing on a page of writing 8 inches/ 20cm away from your eye while holding another 2 ft/ 60 cm away. The one farther away will be way out of focus.

Both seem perfectly in focus for me. The page that is farther away is harder to read because the print is so much smaller at that distance, but both pages seem equally in focus. EDIT: Similarly, when viewing a piece of paper held in my hand while viewing trees two blocks away, everything seems equally in focus to me.

[tclune]

Mike, you piqued my curiosity so I Googled it. The first hit on "vision depth of focus" yielded this paper: https://deepblue.lib.umich.edu/handle/2027.42/23426 You can download the complete paper at no charge if you like. The human visual depth of focus is larger than I would have guessed -- from about 7 ft to infinity on a normal adult human eye. The DOF is larger and the acuity less in babies and smaller animal eyes. But the basic fact remains that the human eye really does have to adjust to bring close or far objects into sharp focus. FWIW