JP S51-114926 A — Kunio Shimada
| 6 ELEMENTS / 5 GROUPS |
| f = 200.28 mm |
| f/3.5 |
| 2ω ≈ 12° |
| ALL-SPHERICAL |
NO_INTERNAL_RECONSTRUCTION — manufacturer MFD is 2.5 m, but JP1976-114926 publishes only one static Example 1 prescription; no internal focus motion is modeled.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | KF3 (supplier-neutral catalog proxy) |
| L2 | Positive Meniscus | S-BSL7 (supplier-neutral catalog proxy) |
| L3 | Biconcave Negative | S-TIH18 (supplier-neutral catalog proxy) |
| L4 | Positive Meniscus | S-TIL27 (supplier-neutral catalog proxy) |
| L5 | Biconcave Negative | K-LaK14 (proxy for inferred nd=1.69680; patent prints 1.59680) |
| L6 | Biconvex Positive | J-F5 (supplier-neutral catalog proxy) |