JP 2013-3324 A EXAMPLE 2 — SIGMA / UEMURA
| 9 ELEMENTS / 7 GROUPS |
| f ≈ 25.0 mm |
| F/1.44 |
| 2ω ≈ 48.6° |
| 3 ASPHERICAL SURFACES (2 ELEMENTS) |
Inner focus — single negative meniscus L8 (G2) moves toward image. G1, stop, G3, and BFD fixed.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | TAFD40 (HOYA) |
| L2 | Negative Meniscus | S-LAH55V (OHARA) |
| L3 | Biconcave Negative | S-TIH53 (OHARA) |
| L4 | Biconvex Positive | S-LAH58 (OHARA) |
| L5 | Positive Meniscus | S-LAH58 (OHARA) |
| L6 | Negative Meniscus | S-TIH53 (OHARA) |
| L7 | Biconvex Positive | S-LAH58 (OHARA) |
| L8 | Neg. Meniscus (1× Asph) | M-LAF81 (Hoya, 731405) |
| L9 | Biconvex Positive (2× Asph) | S-LAH66 (OHARA) |
Detailed analysis available in the interactive viewer above.