JP 2011-248340 A, Example 1 — Nikon / Take Toshinori
| 6 elements / 5 groups |
| f = 10.300 mm patent; 10 mm marketed |
| f/2.8 marketed; FNO 2.92 design |
| 2ω = 78.61° patent; 77° CX production |
| 2 aspherical surfaces |
| Patent close-focus table: 0.50 m |
Rear focusing by translating the entire second lens group G2 toward the object; data file close state follows the patent 0.50 m table, not the production 0.20 m MFD.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | S-FSL5 (OHARA) |
| L21 | Neg. Meniscus (1× Asph) | S-BAL35 (OHARA) |
| L22 | Positive Meniscus | S-LAM7 (OHARA) |
| L23 | Biconcave Negative | S-NPH1/S-NPH1W (OHARA) |
| L24 | Biconvex Positive | S-LAH97 (OHARA) |
| L25 | Biconvex Positive (1× Asph) | M-PCD51 (HOYA, molded phosphate crown) |
Detailed analysis available in the interactive viewer above.