US 4,364,643, Embodiment 3 — Kikuo Momiyama
| 7 elements / 6 groups |
| 46° field of view |
| MFD 0.5 m |
| 52 mm filter thread |
Unit focusing — entire optical assembly translates forward
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | S-LAH64 (OHARA catalog equivalent; patent coordinate 788474; production supplier unspecified) |
| L2 | Positive Meniscus | S-LAH64 (OHARA catalog equivalent; patent coordinate 788474; same glass as L1) |
| L3 | Negative Meniscus | S-TIM39 (OHARA catalog equivalent; patent coordinate 667330; production supplier unspecified) |
| L4 | Negative Meniscus | SF6 (SCHOTT catalog equivalent; patent coordinate 805254; production supplier unspecified) |
| L5 | Positive Meniscus | S-LAH66 (OHARA catalog equivalent; patent coordinate 773496; production supplier unspecified) |
| L6 | Positive Meniscus | LASFN13 catalog equivalent (patent coordinate 863415; production supplier unspecified) |
| L7 | Biconvex Positive | S-LAH66 (OHARA catalog equivalent; patent coordinate 773496; same glass as L5) |