JP S51-053823 A — Kunio Shimada
| 6 ELEMENTS / 6 GROUPS |
| 35mm f/2.8 |
| ALL-SPHERICAL |
NO_INTERNAL_RECONSTRUCTION — manufacturer closest focus is 0.30 m, but no internal optical spacing law is published; model remains at the patent static/infinity state.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | N-BK7 (supplier-neutral catalog proxy) |
| L2 | Biconvex Positive | S-LAM54 (supplier-neutral catalog proxy) |
| L3 | Positive Meniscus | S-BAM12 (supplier-neutral catalog proxy) |
| L4 | Biconcave Negative | SF1 (supplier-neutral catalog proxy) |
| L5 | Positive Meniscus | J-SK16 (supplier-neutral catalog proxy) |
| L6 | Biconvex Positive | J-SK16 (supplier-neutral catalog proxy) |