US 2011/0286116 A1 — Kaori Shimizu, Hisayuki Yamanaka
| 14 ELEMENTS / 10 GROUPS |
| 60mm f/2 (MARKETED) |
| f = 61.500mm, FNO. = 2.06 (PATENT) |
| 2ω = 26.6° |
| 1:1 INNER FOCUS |
| ALL SPHERICAL |
Inner focus: G1 and G4 remain fixed; G2 travels 15.8404 mm imageward and G3 travels 11.7179 mm objectward from infinity to 1:1; the stop remains fixed.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | NBFD15 (HOYA) |
| L2 | Biconvex Positive | S-LAH53 (OHARA) |
| L3 | Biconvex Positive | S-FPL51 (OHARA) |
| L4 | Biconcave Negative | S-TIH4 (OHARA) |
| L5 | Biconvex Positive | S-FPL51 (OHARA) |
| L6 | Biconcave Negative | S-LAH65V (OHARA) |
| L7 | Biconcave Negative | BSC7 (HOYA) |
| L8 | Positive Meniscus, convex to object | S-TIH53 (OHARA) |
| L9 | Biconvex Positive | S-LAL14 (OHARA) |
| L10 | Biconvex Positive | S-LAH66N (OHARA) |
| L11 | Biconcave Negative | S-TIH10 (OHARA) |
| L12 | Biconvex Positive | S-LAL14 (OHARA) |
| L13 | Biconcave Negative | S-TIL2 (OHARA) |
| L14 | Positive Meniscus, convex to object | S-TIH53 (OHARA) |