Learning Event 10
CALCULATE HYPERFOCAL DISTANCE
1. The hyperfocal distance varies with focal length, f/stop, and the
permissible size of the circle of confusion. The following formula is used
for computing hyperfocal distance. NOTE: Numerical values for the formula
must all be expressed in inches or millimeters.
For this lesson, the
formula will be expressed in inches.
a. For non-scientific purposes, 25mm equals
1
inch, 50mm equals 2
inches, etc.
(1) HFD - Hyperfocal Distance
(2) FL2 - Focal Length, Squared
NOTE: To square a number you multiply it by itself.
(3) F - f/stop
(4) CoC - Circle of Confusion
(5) 12 - Convert to feet
b. The formula is written as:
c. Using a 35mm camera (which has a permissible p
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