US 4,126,378 A — Shuji Ogino
| 8 POWERED ELEMENTS / 7 GROUPS |
| f ≈ 599.639 mm |
| F/6.3 CALIBRATED |
| ALL SPHERICAL |
PUBLISHED endpoints: G5/I and G6/II move objectward 9.120 and 14.592 mm; front and rear doublet fixed. Source photographic distance 2000, interpreted object-to-image, scales 6× to 12 m; this is not the production ≈5 m MFD. Linear gap interpolation is not a published cam law. Infinity stop position inferred from Seidel data and held fixed by modeling assumption; no physical iris-motion law is published. Diameter calibrated at infinity.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | N-BK7 spectral proxy (source line unspecified; approximate d-line interpretation; production material unconfirmed) |
| L2 | Biconvex Positive | CaF2 spectral proxy (source line unspecified; approximate d-line interpretation; production material unconfirmed) |
| L3 | Biconcave Negative | H-LaF6LA spectral proxy (source line unspecified; approximate d-line interpretation; production material unconfirmed) |
| L4 | Plano-Convex | PC1 spectral proxy (source line unspecified; approximate d-line interpretation; production material unconfirmed) |
| L5 | Negative Meniscus | LAFL23 spectral proxy (source line unspecified; approximate d-line interpretation; production material unconfirmed) |
| L6 | Biconvex Positive | N-BK7 spectral proxy (source line unspecified; approximate d-line interpretation; production material unconfirmed) |
| L7 | Biconcave Negative | K-LaK11 spectral proxy (source line unspecified; approximate d-line interpretation; production material unconfirmed) |
| L8 | Plano-Convex | S-TIM8 spectral proxy (source line unspecified; approximate d-line interpretation; production material unconfirmed) |