Description
This article is from the
Photographic Lenses FAQ, by David Jacobson with numerous
contributions by others.
06. For a given lens and format what is angle of coverage?
If the format has a width, height, or diagonal of distance X, the
angle of coverage along width, height, or diagonal is
2*arctan(X/(2*f*(M+1))). For example a 35mm frame is 24x36 mm, so
with a 50 mm lens and a distant object (i.e. M virtually zero),
the coverage is 27 degrees by 40 degrees, with a diagonal of 47 degrees.
See the technical notes at the end for qualifications.
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photography, lenses, focal length, bellows, focus, pivot
