JP 2013-161076 A — Yukihiro Yamamoto
| 10 ELEMENTS / 9 GROUPS |
| DESIGN f = 74.56 mm |
| DESIGN F/1.79 |
| 2ω = 16.47° |
| NO ASPHERES |
PUBLISHED endpoint spacings: G2/L6 moves 5.9170 mm imageward; G1 and G3/image remain fixed. Native near state is |β| = 0.10, calculated object-to-image distance 0.846927 m, separate from marketed 0.84 m. Intermediate gaps are interpolated; UI distance labels are approximate, not a published focus law.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | BACD5 (HOYA; published nC/nF/ng equal the catalog values; supplier unconfirmed) |
| L2 | Positive Meniscus | FCD1 (HOYA; published nC/nF/ng equal the catalog values; supplier unconfirmed) |
| L3 | Positive Meniscus | FCD1 (HOYA; published nC/nF/ng equal the catalog values; supplier unconfirmed) |
| L4 | Negative Meniscus | E-FD5 (HOYA; published nC/nF/ng equal the catalog values; supplier unconfirmed) |
| L5 | Positive Meniscus | FCD1 (HOYA coordinate equivalent; supplier unconfirmed) |
| L6 | Negative Meniscus | BACD5 (HOYA coordinate equivalent; supplier unconfirmed) |
| L7 | Negative Meniscus | FD60 (HOYA coordinate equivalent; supplier unconfirmed) |
| L8 | Biconvex Positive | TAFD25 (HOYA coordinate equivalent; supplier unconfirmed) |
| L9 | Biconcave Negative | E-LAF7 (HOYA coordinate equivalent; supplier unconfirmed) |
| L10 | Plano-Convex Positive | TAFD35 (HOYA coordinate equivalent; supplier unconfirmed) |