LEITZ NOCTILUX 50mm f/1.2

US 3,459,468, sole example — Helmut Marx, Paul Sindel

6 ELEMENTS / 4 GROUPS
DESIGN f = 52 mm
DESIGN F/1.2
2 ASPHERICAL SURFACES / 2 ELEMENTS

Focus Mechanism

Patent infinity state only; the production lens focuses to 1.0 m.

Optical Elements (6 physical)

ElementTypeGlass
L1Positive MeniscusUnmatched (ne 1.821 / νe 45.2; no catalog row within the printed precision)
L2Positive MeniscusUnmatched (ne 1.900 / νe 40.5; no catalog row within the printed precision)
L3Negative MeniscusSF56A (SCHOTT catalog equivalent; production supplier unspecified)
L4Biconcave NegativeUnmatched (ne 1.844 / νe 30.0; no catalog row within the printed precision)
L5Biconvex PositiveUnmatched (ne 1.900 / νe 40.5; no catalog row within the printed precision)
L6Biconvex PositiveS-LAL9 (OHARA catalog equivalent; production supplier unspecified)