Focus is the mechanism of converging light from a point light source onto an imaging plane by a lens.
29
votes
7answers
831 views
What is “Hyperfocal Distance”?
I'd like a clear & easy-to-understand (especially for non-physics-types) explanation of what Hyperfocal Distance is, how it affects photographs, and what determines its value.
10
votes
3answers
2k views
How does changing focal length affect depth of field?
I'm curious about how my "area of acceptable focus" changes when the focal length of the lens I'm using changes as I zoom (or switch lenses). In particular, I'd like to know how the front & back ...
