JP 2002-090622 A Example 2 — Cosina / Aida Yoshihisa
| 10 ELEMENTS / 9 GROUPS |
| f = 125.0 mm |
| F/2.5 |
| 2ω ≈ 19.6° |
| ALL-SPHERICAL |
Floating two-group inner focus. Groups 1 and 2 extend forward on a helicoid; Group 3 fixed. Manual focus, no AF motor. 9 rounded aperture blades.
| Element | Type | Glass |
|---|---|---|
| L41 | Positive Meniscus | FK5 (Schott) / K-FK5 (Sumita) |
| L42 | Positive Meniscus | S-FPL51 (OHARA) / K-FPL51 (Sumita) |
| L43 | Positive Meniscus | S-FPL51 (OHARA) / K-FPL51 (Sumita) |
| L44 | Biconcave Negative | E-FD5 (HOYA, patent nd/vd match) / SF5-class dense flint |
| L45 | Negative Meniscus | N-BAF10 (Schott) / K-BAF10 (Sumita) |
| L46 | Positive Meniscus | S-LAH60 (OHARA) / K-LASH60 (Sumita) |
| L47 | Biconvex Positive | S-BAL35 (OHARA) |
| L51 | Negative Meniscus | S-BSL7 (OHARA) / K-BK7 (Sumita) |
| L61 | Biconcave Negative | S-BSL7 (OHARA) / K-BK7 (Sumita) |
| L62 | Biconvex Positive | S-LAL8 (OHARA) / K-LaL8 (Sumita) |
Detailed analysis available in the interactive viewer above.