Lens Lab

A thin lens on a bench. Move things and watch the optics follow: 1/f = 1/u + 1/v.

Subject u
Image v
Lens travel
Iris opening
Near limit
Far limit
Depth of field
Hyperfocal

Full-frame sensor 36 × 24 mm · a disc under 0.030 mm counts as sharp · click a bench object to trace its rays.