When a lens is focussed to the hyperfocal distance H, the

**DOF**of the lens is**maximized**: The range of acceptable sharpness then extends from to infinityThere are two **Formulas ** in use:

For f=50mm, F2, and CoC = 0.03mm we get

**This is the formula we use here.** The results just differ in the focal length of the lens.

and

For f=50mm, F2, and CoC = 0.03mm we get

Where CoC is the circle of confusion, F is the F-number and f is the focal length of the lens.

The hyperfocal distance has **curious mathematical properties**:

The hyperfocal distance H is the distance at which you have to focus an object to receive the largest depth of field. If, namely, a lens is focussed to H, it is focused from to infinity.

When focussed to , so everything from to focused.

When focussed to , so everything from to focused.

When focussed to , so everything from to focused.

…

When focussed to , so everything from to focused.

When focussed to , so everything from to focused.

When focussed to , so everything from to focused.

…

When focussed to , so everything from to focused.

The distance

is the Depth of field.

Notice:

The depth of field is getting smaller, the larger is n, say the shorter the working distance is!