US 3,634,001 A — Kunio Shimada
| 7 ELEMENTS / 5 GROUPS |
| f ≈ 50.004 mm |
| F/1.4 |
| PATENT 2ω = 45° |
| ALL SPHERICAL |
Only the patent's infinity prescription is modeled. The production lens focuses to 0.43 m, but the source does not establish its optical focus movement.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | J-BASF8 (Hikari spectral proxy for patent BaSF8; historical supplier/melt unconfirmed) |
| L2 | Biconvex Positive | J-BASF8 (Hikari spectral proxy for patent BaSF8; historical supplier/melt unconfirmed) |
| L3 | Biconcave Negative | SF1 (Schott spectral proxy for patent SF1; historical supplier/melt unconfirmed) |
| L4 | Biconcave Negative | SF1 (Schott spectral proxy for patent SF1; historical supplier/melt unconfirmed) |
| L5 | Biconvex Positive | J-LAK09 (Hikari spectral proxy for patent LaK09; historical supplier/melt unconfirmed) |
| L6 | Positive Meniscus | J-BAF11 (Hikari spectral proxy for patent BaF11; historical supplier/melt unconfirmed) |
| L7 | Biconvex Positive | J-BAF11 (Hikari spectral proxy for patent BaF11; historical supplier/melt unconfirmed) |