JP 2014-209144 A — Taku Matsuo, Takeshi Suzuki, Haruo Sato, Hisayuki Yamanaka
| 19 ELEMENTS / 12 GROUPS |
| f = 205–487 mm |
| F/4.62–5.78 (patent); F/5.6 (marketed) |
| 2ω ≈ 11.8–5.0° |
| ALL SPHERICAL |
| 3 ED ELEMENTS |
Internal focus via G5 (L5) axial translation toward image. G5 is a negative cemented doublet.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-LAH65 (OHARA) |
| L2 | Biconvex Positive | J-FKH1 (Hikari) — ED fluorophosphate crown (498826) |
| L3 | Biconvex Positive | J-FKH1 (Hikari) — ED fluorophosphate crown (498826) |
| L4 | Positive Meniscus | S-TIM5 (OHARA) |
| L5 | Biconcave Negative | S-LAL18 (OHARA; exact patent coordinate match) |
| L6 | Biconcave Negative | 517522 — crown (patent nd=1.51742, νd=52.15) |
| L7 | Positive Meniscus | S-TIH6 (OHARA) |
| L8 | Biconcave Negative | NBF1 (HOYA; exact 743492 coordinate) |
| L9 | Biconvex Positive | N-SK2 (Schott) |
| L10 | Negative Meniscus | N-SSK5 (Schott) — extra dense crown (658509) |
| L11 | Negative Meniscus | S-LAH95 (OHARA) |
| L12 | Biconvex Positive | N-FK5 (Schott) / E-FEL1 (HOYA) |
| L13 | Biconvex Positive | S-FPL51 (OHARA) / FCD1 (HOYA) [ED] |
| L14 | Negative Meniscus | NBFD10 (HOYA catalog equivalent for patent 834373; production supplier unspecified) |
| L15 | Positive Meniscus | NBF1 (HOYA; exact 743492 coordinate) |
| L16 | Biconvex Positive | E-FD2 (HOYA; exact 648338 coordinate) |
| L17 | Biconcave Negative | S-LAL18 (OHARA; exact patent coordinate match) |
| L18 | Positive Meniscus | E-FL5 (HOYA) |
| L19 | Negative Meniscus | S-LAH55 (OHARA) |