US 3,841,736, Table III — Yasuo Takahashi, Sadao Okudaira
| 12 ELEMENTS / 11 GROUPS |
| DESIGN f = 100 (NORMALIZED; SCALED 0.18× TO 18 mm) |
| DESIGN F/3.5 |
| ALL SPHERICAL |
| FILTER PLATE NOT MODELED |
The model stays at infinity: the patent says nothing about focusing, naming no focusing lens or direction and printing no close-focus spacings. Pentax's table lists 0.25 m.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | LACL60 (HOYA catalog equivalent; production supplier unspecified) |
| L2 | Plano-Convex | S-BSL7 (OHARA catalog equivalent; production supplier unspecified) |
| L3 | Negative Meniscus | LACL60 (HOYA catalog equivalent; production supplier unspecified) |
| L4 | Negative Meniscus | S-BSL7 (OHARA catalog equivalent; production supplier unspecified) |
| L5 | Biconvex Positive | LACL60 (HOYA catalog equivalent; production supplier unspecified) |
| L6 | Biconvex Positive | F1 (SUMITA catalog equivalent; production supplier unspecified) |
| L7 | Biconvex Positive | S-BSL7 (OHARA catalog equivalent; production supplier unspecified) |
| L8 | Biconcave Negative | S-LAH60 (OHARA catalog equivalent; production supplier unspecified) |
| L9 | Positive Meniscus | S-FSL5 (OHARA catalog equivalent; production supplier unspecified) |
| L10 | Negative Meniscus | SF6 (Schott catalog equivalent; production supplier unspecified) |
| L11 | Biconvex Positive | S-BSL7 (OHARA catalog equivalent; production supplier unspecified) |