The Photo Calculator for the Palm covers 37 digital formats including 9 digital backs and 12 conventional film formats. The calculations include angle of view, depth of field, hyperfocal distance and image area covered.

Hyperfocal Distance Calculator
The Hyperfocal distance is the distance from the lens to the nearest part of the subject that is in acceptable focus when the lens is focused upon infinity. The Douglas Photo Calculator will calculate your correct Hyperfocal distance with just a few clicks.

Angle of View Calculator
In still photography this is defined as “the angle subtended at the lens by the diagonal of the film format.” The focal length of a lens also determines the angle of view of the lens as used in conjunction with a given film format size. This helps find equivalent lenses when comparing film formats.