JP 2004-101880 A, Example 2 — Yoshihisa Yomogida
| 10 ELEMENTS / 7 GROUPS |
| f ≈ 35.8 mm |
| F/1.24 |
| 2ω ≈ 63.6° |
| 3 ASPHERICAL SURFACES |
Unit focus — entire optical assembly translates via helicoid. Close position calculated for the 0.7 m rangefinder-coupled limit (Version I MFD).
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | FC5 (HOYA) |
| L2a | Biconcave Negative | S-TIL26 (OHARA) |
| L2b | Biconvex Positive | TAF3 (HOYA) |
| L3a | Biconvex Positive | TAF3 (HOYA) |
| L3b | Biconcave Negative | E-FD2 (HOYA) |
| L4 | Neg. Meniscus (1× Asph) | NBFD13 (HOYA) |
| L5a | Biconcave Negative | FD60 (HOYA) |
| L5b | Biconvex Positive | TAF3 (HOYA) |
| L6 | Biconvex Positive (2× Asph) | NBFD13 (HOYA) |
| L7 | Biconcave Negative | S-TIL1 (OHARA) |