Idealized thin-lens camera demo

In focus

Light through apertureCentral rayPlane in focusDarker lens = stronger bending

↔ Drag the green point horizontally, or use the object distance slider. Diagram uses fixed, different scales for object and image space.

Focal length (lens property) 50 mm

43 mm · shorter51.5 mm · longer

Focus (lens–sensor distance) 54.55 mm

Farther focusNearer focus

Aperture diameter 25 mm

2 mm · smallerf/2.060 mm · larger

Object distance 600 mm

200 mm · nearer1000 mm · farther