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.