OLYMPUS E.ZUIKO AUTO-T 135mm f/3.5 — Optical Cross-Section & Ray Tracing

Home / Lenses / Olympus / OLYMPUS E.ZUIKO AUTO-T 135mm f/3.5OLYMPUS E.ZUIKO AUTO-T 135mm f/3.5US 3,838,911 EXAMPLE 1 — OLYMPUS / IKEDA
5 ELEMENTS / 4 GROUPS
f ≈ 135.0 mm
F/3.5
2ω ≈ 18°
ALL-SPHERICAL
Focus MechanismUnit focus — entire five-element optical block translates via straight helicoid.
Optical Elements (5)ElementTypeGlass
L1Positive MeniscusN-SK16 (Schott) / S-BSM16 (OHARA) class (620602)
L2Plano-Convex Positive487698 — FK/FSL low-dispersion crown class (patent nd=1.48749, νd=69.8; no exact modern coefficient-backed match)
L3Plano-Concave NegativeSF14 / N-SF14 (Schott) / S-TIH14 (OHARA) class (762265)
L4Negative MeniscusS-BAH32 (OHARA) exact match (670393)
L5Positive MeniscusN-SF6 / SF6 (Schott) / S-TIH6 (OHARA) class (805254)
AnalysisDetailed analysis available in the interactive viewer above.

Element	Type	Glass
L1	Positive Meniscus	N-SK16 (Schott) / S-BSM16 (OHARA) class (620602)
L2	Plano-Convex Positive	487698 — FK/FSL low-dispersion crown class (patent nd=1.48749, νd=69.8; no exact modern coefficient-backed match)
L3	Plano-Concave Negative	SF14 / N-SF14 (Schott) / S-TIH14 (OHARA) class (762265)
L4	Negative Meniscus	S-BAH32 (OHARA) exact match (670393)
L5	Positive Meniscus	N-SF6 / SF6 (Schott) / S-TIH6 (OHARA) class (805254)