Understanding Lenses and the Focal length and Distance of Shooting
10820
What is the formula for percent of frame filled at a specific distance and focal length?
98701
If a lens focuses all incoming light to a point, how do we get 2D images?
83556
What are the theoretical minimum and maximum apertures?
21744
Focal length of an ellipse and related results
134974
What is the focal length on your typical cell phone camera?
91299
What does a megapixel designation on a lens actually mean?
128590
Is the formula for object image size given focal length, etc. independent of sensor size?
37422
Since it's not "focal length", what is the term for the distance at which things are in focus?
38537
What is the relationship between ISO, aperture, and shutter speed?
79654
What is the effect of the number of cross-type focus points on sharp focus?
71754
Why do two zoom lenses set to 200mm on the same camera produce different fields of view?
51290
Does my crop sensor camera actually turn my lenses into a longer focal length?
62822
How can lens cause consistent front or back focus?
96984
Is it lenses which make your photographs, not camera bodies?
101300
What to look for in a wide angle lens?
80219
What is the relationship between field of view and focal length for fisheye?
101960
Why are crop lenses indicated with focal lengths they don't have?