US 2013/0033768 A1 Example 2 — Sony / Sunaga, Otake, Hosoi
| 8 ELEMENTS / 7 GROUPS |
| f ≈ 23.3 mm |
| F/1.8 |
| 2ω ≈ 61.7° |
| 3 ASPHERICAL SURFACES |
Inner focus: single negative meniscus G7 (GR2) translates axially. Linear AF motor.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-FSL5 (OHARA) |
| L2 | Neg. Meniscus (1× Asph) | N-SK5 (Schott) |
| L3 | Positive Meniscus | S-LAH55V (OHARA) |
| L4 | Biconcave Negative | S-TIH4 (OHARA) |
| L5 | Biconvex Positive | S-PHM52 (OHARA) |
| L6 | Biconvex Positive (2× Asph) | Unmatched (lanthanum dense crown, 801/454; likely restricted-catalog PGM formulation) |
| L7 | Negative Meniscus | N-LAK14 (Schott) |
| L8 | Biconvex Positive | S-PHM52 (OHARA) |
Detailed analysis available in the interactive viewer above.