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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