Watching Over

by Vian Esterhuizen

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

Focal length is the distance (measured in mm) between the surface of a lens and the focal point. Smaller focal lengths indicate wide-angle lenses, larger focal lengths indicate a telephoto lens.

learn more… | top users | synonyms

13
votes
4answers
4k 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 ...