US 7,218,457 B2 — Takayuki Sensui
| 14 elements / 12 groups |
| 1 ED element (S-FPL51) |
| All-spherical |
| VR II (G4a shift) |
| F-mount (FX) |
| 62 mm filter |
Internal floating focus — G2 moves image-ward, G3 moves object-ward; G1, aperture stop, G4 fixed. Equal-and-opposite cam: ΔD8 = −ΔD13, ΔD14 = −ΔD20.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | S-LAH66 (OHARA) |
| L2 | Positive Meniscus | BACD4 (HOYA catalog equivalent; production supplier unspecified) |
| L3 | Biconcave Negative | S-TIH1 (OHARA) |
| L4 | Plano-Convex | S-LAH66 (OHARA) |
| L5 | Biconcave Negative | BAF3 |
| L6 | Biconcave Negative | S-TIL6 (OHARA catalog equivalent; production supplier unspecified) |
| L7 | Positive Meniscus | S-TIH6 (OHARA) |
| L8 | Biconvex Positive | S-FPL51 (OHARA) — ED fluorophosphate |
| L9 | Negative Meniscus | S-TIH53W (OHARA) / SF57 (SCHOTT) |
| L10 | Biconvex Positive | S-BSM16 (OHARA) |
| L11 | Negative Meniscus | S-LAH53 (OHARA) |
| L12 | Positive Meniscus | S-TIH6 (OHARA) |
| L13 | Negative Meniscus | S-NSL3 (OHARA) |
| L14 | Biconvex Positive | S-LAH51 (OHARA) |