JP 2004-101880A Example 2 — Cosina / Hoda
| 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. Rangefinder coupled to 0.7 m (Version I).
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-FSL5 (OHARA) |
| L2a | Biconcave Negative | S-TIL26 (OHARA) |
| L2b | Biconvex Positive | S-LAH65 (OHARA) |
| L3a | Biconvex Positive | S-LAH65 (OHARA) |
| L3b | Biconcave Negative | E-FD2 (HOYA, patent nd/vd match) / S-TIM22 class |
| L4 | Neg. Meniscus (1× Asph) | S-LAH63 (OHARA) |
| L5a | Biconcave Negative | S-TIH6 (OHARA) |
| L5b | Biconvex Positive | S-LAH65 (OHARA) |
| L6 | Biconvex Positive (2× Asph) | S-LAH63 (OHARA) |
| L7 | Biconcave Negative | S-TIL1 (OHARA) |
Detailed analysis available in the interactive viewer above.