Relationship between the focal length and sensor size
15644
What is crop factor and how does it relate to focal length?
9226
What is the difference between image size and image quality?
63287
What is meant by pixels and DPI for photo submissions?
30143
Would it be possible to make a 36×36 mm "full frame" sensor?
10570
Does sensor size affect lens distortion?
153578
Variable focal length for macro lenses?
75334
Why do Full Frame lenses and crop body lenses exhibit the same crop factor when used on a crop body camera?
101461
Length of Feature
17968
Does 4.0-72mm on the lens when equivalent focal length is 24-432mm mean crop factor of 6×?
101960
Why are crop lenses indicated with focal lengths they don't have?
126119
Focus in night photography
86838
What do the red values mean on the distance scale of a lens?
87866
Tracking a shot with focal variation (zoom)
126293
Relationship between slit size and wavelength in diffraction
6598
How to calculate the correct focal length needed for a subject of a given size and distance?
38537
What is the relationship between ISO, aperture, and shutter speed?
129613
Why does illuminance stay the same for a given f-stop even when focal length changes?