Depth of Field & Optics

Hyperfocal distance, near/far focus limits & total in-focus range.

Focal Length (mm)

Aperture f/

Focus Distance (m)

Assumes full-frame sensor (CoC 0.029 mm).

Hyperfocal Distance

30.86 m

Focus at this distance → everything from half of it to infinity is sharp.

Near Limit

2.57 m

Far Limit

3.60 m

In-Focus Range

1.03 m

Wider apertures and longer lenses shrink DOF — great for portraits, tricky for landscapes.

Did you know?

The "f-number" (f/2.8, f/4...) comes from dividing focal length by aperture diameter — a lens' aperture is just how wide its "eye" opens.

Formula

H = (focal² / (aperture × CoC)) + focal

What is CoC?

Circle of Confusion — the largest blur spot perceived as a point. Full-frame ≈ 0.029 mm, APS-C ≈ 0.019 mm.