hyperfocal
distance
& depth of field calculator |

Since a normal human eye can resolve
5 lines per millimetre at a distance of 25cm, and
the diagonal measurement of a 7 x 11 print (for an uncropped 35mm
frame) is 330mm, then;
35mm
film's diagonal measurement is 43mm,
therefore the Resolution Factor = 38.372
The Resolution Factor enables us
to calculate the Circle of Confusion of .026 for 35mm.
The Circle of Confusion for 35mm is .026, so if your 35mm format lens has a focal length of 50mm and the aperture is set to f8, then the Hyperfocal
distance is 12019mm (12 meters
or approximately 39.4 feet).
So, if you're using a 35mm camera with a 50mm lens and you set your aperture to WebPage Copyright © 1998- G. Morris Photography |