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Hyperfocal Distance Calculator

Formula

To calculate the Hyperfocal Distance (HD):

$HD = \frac{FL^2}{CoC \cdot F-s}$

Where:

$HD$ is the Hyperfocal Distance (mm)
$FL$ is the focal length (mm)
$CoC$ is the circle of confusion (mm)
$F-s$ is the f-stop

What is Hyperfocal Distance?

Hyperfocal distance is the closest distance at which a lens can be focused while keeping objects at infinity acceptably sharp. It is the lowest possible frequency required for a system, usually a tube with sound moving through it, to be resonating.

Example Calculation 1

Let's assume the following values:

Focal Length (FL) = 50 mm
Circle of Confusion (CoC) = 0.02 mm
F-Stop (F-s) = 8

Using the formula:

$HD = \frac{50^2}{0.02 \cdot 8} = 15625$

The hyperfocal distance is 15625 mm.

Example Calculation 2

Let's assume the following values:

Focal Length (FL) = 35 mm
Circle of Confusion (CoC) = 0.03 mm
F-Stop (F-s) = 11

Using the formula:

$HD = \frac{35^2}{0.03 \cdot 11} = 3712.12$

The hyperfocal distance is 3712.12 mm.