JP 1983-149014 A — Norikazu Arai, Hiroshi Miyamae, Shozo Ishiyama, Makoto Sakano, Tadashi Kojima
| 13 ELEMENTS / 9 GROUPS |
| 65–135mm MARKETED / 66.290–135.095mm MODELED |
| f/4 MARKETED / f/4.0033–3.9974 MODELED |
| 36°–18° MARKETED |
| ALL-SPHERICAL |
PUBLISHED: surfaces 1–13 translate together toward the object for focus. The 1.5 m model state uses the published Table 8 wide/tele shifts of 4.694/22.040 mm; the 92.433 mm mid shift of 9.458720 mm is code-evaluated from the same published mechanism at U=1500 mm. The inferred STO, G4, and BFD remain fixed; patent U is object-to-image distance and is not silently equated to the product MFD reference plane.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | E-FD13 catalog-equivalent coefficient proxy (patent 741278; production supplier unspecified) |
| L2 | Biconvex Positive | S-BAH10 catalog-equivalent coefficient proxy (patent 670473; production supplier unspecified) |
| L3 | Biconcave Negative | J-SK16 catalog-equivalent coefficient proxy (patent 620603; production supplier unspecified) |
| L4 | Biconcave Negative | TAC4 catalog-equivalent coefficient proxy (patent 735498; production supplier unspecified) |
| L5 | Positive Meniscus | H-ZF13 catalog-equivalent coefficient proxy (patent 785257; production supplier unspecified) |
| L6 | Biconvex Positive | J-SK16 catalog-equivalent coefficient proxy (patent 620603; production supplier unspecified) |
| L7 | Negative Meniscus | H-ZF13 catalog-equivalent coefficient proxy (patent 785257; production supplier unspecified) |
| L8 | Biconvex Positive | J-SK16 catalog-equivalent coefficient proxy (patent 620603; production supplier unspecified) |
| L9 | Biconcave Negative | S-BAL12 catalog-equivalent coefficient proxy (patent 540595; production supplier unspecified) |
| L10 | Plano-Convex Positive | S-BAH28 catalog-equivalent coefficient proxy (patent 723380; production supplier unspecified) |
| L11 | Biconcave Negative | S-TIM6 catalog-equivalent coefficient proxy (patent 636354; production supplier unspecified) |
| L12 | Negative Meniscus | BAL15Y catalog-equivalent coefficient proxy (patent 557587; production supplier unspecified) |
| L13 | Biconvex Positive | J-LAK7R catalog-equivalent coefficient proxy (patent 652586; production supplier unspecified) |