YASHICA ML 300mm f/5.6 C — Optical Cross-Section & Ray Tracing

Home / Lenses / Yashica / YASHICA ML 300mm f/5.6 CYASHICA ML 300mm f/5.6 CJP1978-129629 — Toshio Funejima, Hamao Inagaki
6 ELEMENTS / 3 GROUPS
300mm f/5.6
2ω = 8.5°
ALL SPHERICAL
Focus MechanismNO_INTERNAL_RECONSTRUCTION: the production lens is documented to focus to 4.5 m, but JP1978-129629 Example 2 publishes no finite-focus spacing states; no internal focus movement is modeled.
Optical Elements (6 physical)ElementTypeGlass
L1Biconvex Positive487704 - FK5 class (vendor unresolved)
L2Biconcave Negative757318 - E-LAF11 catalog equivalent (production supplier unspecified)
L3Positive Meniscus487704 - FK5 class (vendor unresolved)
L4Biconcave Negative816468 - S-LAH59 catalog equivalent (production supplier unspecified)
L5Biconvex Positive593348 - FF5-class catalog proxy (production supplier unspecified; patent theta_gF=0.589)
L6Negative Meniscus788475 - lanthanum glass class (vendor unresolved)

Element	Type	Glass
L1	Biconvex Positive	487704 - FK5 class (vendor unresolved)
L2	Biconcave Negative	757318 - E-LAF11 catalog equivalent (production supplier unspecified)
L3	Positive Meniscus	487704 - FK5 class (vendor unresolved)
L4	Biconcave Negative	816468 - S-LAH59 catalog equivalent (production supplier unspecified)
L5	Biconvex Positive	593348 - FF5-class catalog proxy (production supplier unspecified; patent theta_gF=0.589)
L6	Negative Meniscus	788475 - lanthanum glass class (vendor unresolved)