Sometimes pithy photographic explanations, although valid and meaningful for the cognoscenti, can need some unpacking for most folk. Consider that Ansel Adams and others have used whole books, with charts, tables, graphs, and examples, just to say “expose for the shadows, develop for the highlights.” Thus it is — possibly, anyway — with photon noise. This post… [Read More]
Aliasing visibility and PS downsampling
I interrupt the series of posts on DOF for this one that proves a point that most of my blog readers already know: in general downsampling can cause aliasing, and in particular the downsampling algorithms in Photoshop do cause aliasing, at least some of the time. I’ve addressed this issue before, with spectral plots showing… [Read More]
Depth of field and the web
This is a continuation of a report on new ways to look at depth of field. The series starts here: A new way to look at depth of field Many of us use our fancy cameras occasionally to produce low-resolution images for the web. We should have tons of DOF in that case, right? And… [Read More]
Some thoughts on object-field DOF management
This is a continuation of a report on new ways to look at depth of field. The series starts here: A new way to look at depth of field I’m beginning to wind down this long, long look into the details of depth of field (DOF) management. Today I’ll devote the post to object-field (OF)… [Read More]
Do sharper lenses have more, or less, DOF?
This is a continuation of a report on new ways to look at depth of field. The series starts here: A new way to look at depth of field I’ve heard photographers say that sharper lenses — and cameras, for that matter — have less depth of field (DOF) than lesser ones. Is that true?… [Read More]
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