VOIGTLÄNDER APO-LANTHAR 180mm f/4 SL Close Focus — Optical Cross-Section & Ray Tracing

Home / Lenses / Voigtländer / VOIGTLÄNDER APO-LANTHAR 180mm f/4 SL Close FocusVOIGTLÄNDER APO-LANTHAR 180mm f/4 SL Close FocusJP 2003-270529 A Example 1 — Cosina / 蓬田 祥寿
9 ELEMENTS / 7 GROUPS
f ≈ 197.9 mm (patent) / 180 mm (marketed)
F/4
2ω ≈ 12.4°
ALL SPHERICAL
Focus MechanismUnit focus — entire optical assembly translates forward.
Optical Elements (9)ElementTypeGlass
L11Positive MeniscusS-FPL51 (OHARA)
L12Positive MeniscusS-FPL51 (OHARA)
L13Positive MeniscusS-FPL51 (OHARA)
L21Negative MeniscusS-LAH55 (OHARA)
L22Positive MeniscusS-FSL5 (OHARA)
L23Near-Plano-Concave NegativeS-LAH53 (OHARA)
L24Positive MeniscusS-TIH10 (OHARA)
L31Positive MeniscusS-TIH6 (OHARA)
L32Negative MeniscusS-LAH53 (OHARA)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L11	Positive Meniscus	S-FPL51 (OHARA)
L12	Positive Meniscus	S-FPL51 (OHARA)
L13	Positive Meniscus	S-FPL51 (OHARA)
L21	Negative Meniscus	S-LAH55 (OHARA)
L22	Positive Meniscus	S-FSL5 (OHARA)
L23	Near-Plano-Concave Negative	S-LAH53 (OHARA)
L24	Positive Meniscus	S-TIH10 (OHARA)
L31	Positive Meniscus	S-TIH6 (OHARA)
L32	Negative Meniscus	S-LAH53 (OHARA)