US 2013/0321936 A1, Example 3 — Kazuyasu Ohashi
| 7 ELEMENTS / 5 GROUPS |
| f ≈ 18.3 mm |
| F/2.8 |
| 2ω ≈ 76.4° |
| 2 ASPHERICAL SURFACES |
Unit focus — the whole lens moves toward the object (patent ¶[0115]). Close state is a calculated 1.30 mm extension for the 0.30 m normal-mode MFD; the 0.10 m macro mode is not modeled.
| Element | Type | Glass |
|---|---|---|
| L1 | Neg. Meniscus (1× Asph) | M-FCD1 (HOYA) |
| L2 | Biconcave Negative | E-FD8 (HOYA) |
| L3 | Negative Meniscus | FDS90 (HOYA) |
| L4 | Biconvex Positive | TAFD30 (HOYA) |
| L5 | Biconvex Positive | TAFD30 (HOYA) |
| L6 | Biconcave Negative | E-FD8 (HOYA) |
| L7 | Neg. Meniscus (1× Asph) | M-TAFD51 (HOYA) |