JP 2002-365547 A — Makoto Mitsusaka
| 15 ELEMENTS / 12 GROUPS |
| PATENT EFL 28.903-101.333 mm |
| PATENT f/3.63-4.67 |
| ALL-SPHERICAL |
| INNER FOCUS |
Inner focus. The patent recommends moving negative Group 2; close-focus D5/D13 values are a paraxial L2-only model solved at the official 0.50 m MFD, not a published production cam law.
| Element | Type | Glass |
|---|---|---|
| L1a | Negative Meniscus | S-TIH53 (OHARA equivalent; vendor unspecified) |
| L1b | Positive Meniscus | S-BSM15 (OHARA equivalent; vendor unspecified) |
| L1c | Positive Meniscus | S-LAL8 (OHARA equivalent; vendor unspecified) |
| L2a | Negative Meniscus | S-LAH60V (OHARA equivalent; vendor unspecified) |
| L2b | Biconcave Negative | S-LAH65V (OHARA equivalent; vendor unspecified) |
| L2c | Biconvex Positive | PBH53 / PBH53W (OHARA historical equivalent; vendor inferred, 847-239) |
| L2d | Biconcave Negative | S-LAH66 (OHARA equivalent; vendor unspecified) |
| L3a | Negative Meniscus | PBH53 / PBH53W (OHARA historical equivalent; vendor inferred, 847-239) |
| L3b | Biconvex Positive | S-BSM15 (OHARA equivalent; vendor unspecified) |
| L3c | Biconvex Positive | S-BSM14 (OHARA equivalent; catalog code 603607) |
| L4a | Positive Meniscus | S-TIM35 (OHARA equivalent; vendor unspecified) |
| L4b | Biconcave Negative | S-LAL8 (OHARA equivalent; vendor unspecified) |
| L5a | Biconvex Positive | S-FSL5 (OHARA equivalent; vendor unspecified) |
| L5b | Biconvex Positive | S-BAL35 (OHARA equivalent; catalog code 589612) |
| L5c | Negative Meniscus | PBH53 / PBH53W (OHARA historical equivalent; vendor inferred, 847-239) |