US 9,063,253 B2 — Nobuyuki Adachi
| 14 ELEMENTS / 11 GROUPS |
| f = 92.556 mm (COMPUTED) |
| F/2.89 DESIGN / f/2.8 MARKETED |
| 2ω = 26.24° AT INFINITY |
| 2 XLD + 1 LD |
| 1:1 FLOATING INNER FOCUS / VC |
Three-group floating inner focus. G2 translates 18.049 mm imageward; G3 and G4 translate 12.300 mm and 17.570 mm objectward from infinity to 1:1. The viewer interpolates between those endpoints.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | 773/496 lanthanum glass (OHARA S-LAH66N / HOYA TAF1 equivalent) |
| L2 | Biconvex Positive | FCD100 (HOYA) |
| L3 | Biconcave Negative | FDS90 (HOYA) |
| L4 | Positive Meniscus | FCD100 (HOYA) |
| L5 | Negative Meniscus | S-LAH59 (OHARA) |
| L6 | Biconcave Negative | S-FSL 5 (OHARA; catalog νd 70.23, patent 70.24) |
| L7 | Biconvex Positive | FDS90 (HOYA) |
| L8 | Biconvex Positive | FCD515 (HOYA) |
| L9 | Negative Meniscus | S-TIH10 (OHARA) |
| L10 | Biconvex Positive | S-LAL12Q (OHARA) |
| L11 | Negative Meniscus | S-BAL35 (OHARA; catalog νd 61.14, patent 61.13) |
| L12 | Positive Meniscus | S-TIH 6 (OHARA) |
| L13 | Biconvex Positive | S-LAL10 (OHARA) |
| L14 | Biconcave Negative | FDS90 (HOYA) |