US 2010/0238560 A1, Example 1 — Makoto Fujimoto
| 17 ELEMENTS / 11 GROUPS (+ RESIN LAYER) |
| f = 16.48–33.94 mm |
| F/4.1 CONSTANT |
| 2ω = 108°–63° |
| 4 ASPHERICAL SURFACES / 3 ELEMENTS |
| 2 ED-CLASS ELEMENTS (νd 82.5) |
Internal focusing by axial movement of cemented lens CL21 (L21+L22) inside G2 (¶0060). The patent tabulates no close-focus gaps, so focus travel is not modeled; 0.29 m is Nikon's published minimum focus distance.
| Element | Type | Glass |
|---|---|---|
| L11 | Neg. Meniscus (2× Asph) | J-LASFH2 (HIKARI nearest catalog equivalent; patent 1.76690/46.85, catalog 1.76684/46.78) |
| L12 | Biconcave Negative | S-LAH58 (OHARA) |
| L13 | Biconcave Negative | S-LAH58 (OHARA) |
| L13r | Asph. Resin Layer (1× Asph) | UV-cure resin |
| L14 | Biconvex Positive | S-TIM35 (OHARA) |
| L21 | Negative Meniscus | S-TIH53 (OHARA) |
| L22 | Biconvex Positive | S-TIM5 (OHARA) |
| L23 | Biconvex Positive | S-NSL3 (OHARA) |
| L31 | Positive Meniscus | S-BAH27 (OHARA) |
| L32 | Biconcave Negative | S-LAH58 (OHARA) |
| L33 | Negative Meniscus | S-LAH58 (OHARA) |
| L34 | Biconvex Positive | S-TIH53 (OHARA) |
| L41 | Biconvex Positive | J-FKH1 (HIKARI catalog equivalent; S-FPL51-class ED fluorophosphate, vendor unspecified) |
| L42 | Biconcave Negative | S-LAH60 (OHARA) |
| L43 | Biconvex Positive | J-FKH1 (HIKARI catalog equivalent; S-FPL51-class ED fluorophosphate, vendor unspecified) |
| L44 | Negative Meniscus | S-LAH58 (OHARA) |
| L45 | Biconvex Positive | S-FSL5 (OHARA) |
| L46 | Neg. Meniscus (1× Asph) | S-LAH53 family (OHARA) |