SCHACHT S-TRAVENAR 135mm f/2.8 — Optical Cross-Section & Ray Tracing

Home / Lenses / Schacht / SCHACHT S-TRAVENAR 135mm f/2.8SCHACHT S-TRAVENAR 135mm f/2.8CH 479 879↗ — Ludwig Bertele, Jürgen Bertele
4 ELEMENTS / 4 GROUPS
135 mm f/2.8 marketed
f = 135.0119 mm modeled
24×36 mm; patent field ≈ ±10°
ALL-SPHERICAL
Focus MechanismNO_INTERNAL_RECONSTRUCTION — one patent prescription state only; no internal focus motion is modeled.
Optical Elements (4 physical)ElementTypeGlass
L1Positive Element521697 — phosphate crown (J-PKH1 compatible dispersion proxy; supplier unconfirmed)
L2Positive Meniscus620603 — SK16/BSM16 class (supplier unconfirmed)
L3Negative Meniscus722292 — dense flint (catalog-equivalent S-TIH18; supplier unconfirmed)
L4Biconvex Positive728284 — SF10-class dense flint (supplier unconfirmed)

Element	Type	Glass
L1	Positive Element	521697 — phosphate crown (J-PKH1 compatible dispersion proxy; supplier unconfirmed)
L2	Positive Meniscus	620603 — SK16/BSM16 class (supplier unconfirmed)
L3	Negative Meniscus	722292 — dense flint (catalog-equivalent S-TIH18; supplier unconfirmed)
L4	Biconvex Positive	728284 — SF10-class dense flint (supplier unconfirmed)