Simple Zoom Lens — Minimal Model

Full‑frame • CoC 0.03 mm

Controls

Focal length

35 mm

Focus distance

2.00 m

Aperture

f/4.0

Rays per field

7

Show off‑axis rays (±8°)

Use RGB dispersion

Show thin‑lens overlay

Highlight chief & marginal

Flip direction (visual)

Show outside origin (true source)

EFL: —

BFD: —

DOF: —

Thin‑lens s′: —

Tip: drag to pan, wheel to zoom, R to reset.