Depth-of-Field Calculator - NS 2.0 MSIE 3.0 or later
Required
To find the near, far and hyperfocal distance for a specific lens,
enter the focal length (mm), aperture (f/number) and
the object distance (whole or decimal number). The
JavaScript program will calculate the near, far, depth and hyperfocal distances.
The unit of measure for distances is feet. This can be
overridden by selecting meters. Your MSIE and later Netscape browser will print
the tables, others must print screen to the clipboard and print from some other
application.
The formula used for this
table.
and extended
by Ralph Barker to cover wider aperture lenses common with 35mm, as well as
typical large-format lenses. As a result, f-stops at either end of the chart may
not apply to a particular lens.
The table is based on the following Circle of Confusion sizes: 35mm = .03,
645 = .05, 6x6 = .06, 6x7 = .065, 6x9 = .075, 4x5 = .15, 5x7 = .20, 8x10 =
.30.
You may use this code freely for any non-commercial purpose, written
authorization for all other uses.
Please direct any questions, suggestions or comments via Email to: gillettm@home.com