CARL ZEISS JENA BIOMETAR 120mm f/2.8

US 2,968,221, Example II — Harry Zöllner

5 ELEMENTS / 4 GROUPS
f = 119.232 mm (design)
F/2.8 (modeled calibration)
PATENT 2ω = 46°

Focus Mechanism

Not modeled: infinity prescription only; 1.3 m MFD is metadata, with no internal motion modeled.

Optical Elements (5 physical)

ElementTypeGlass
L1Positive Meniscus, convex to object668419 — coordinate class (supplier unresolved)
L2Plano-Convex Positive658508 — coordinate class (supplier unresolved)
L3Plano-Concave Negative648338 — coordinate class (supplier unresolved)
L4Negative Meniscus, concave to object728283 — coordinate class (supplier unresolved)
L5Positive Meniscus, convex to image620603 — coordinate class (supplier unresolved)