CN 216772097U Example 1 — Xiamen Panasonic / Zheng, Chen, Zhan
| 11 ELEMENTS / 9 GROUPS |
| f ≈ 33.8 mm |
| F/1.8 |
| 2ω ≈ 63° |
| 3 ASPHERICAL ELEMENTS (6 SURFACES) |
Inner focus — single negative element (L21, Group G2) driven by linear motor. Total travel 6.92 mm; overall optical length is constant.
| Element | Type | Glass |
|---|---|---|
| L11 | Positive Meniscus | Unmatched (ultra-dense niobium flint, 946/180 — no public catalog match; probable proprietary Chinese composition) |
| L12 | Negative Meniscus | S-FPL51 (OHARA) / FCD1 class (ED fluorophosphate, νd = 81.6) |
| L13 | Negative Meniscus | H-ZF13 (CDGM) — dense flint |
| L14 | Positive Meniscus | S-FPL51 (OHARA) / FCD1 class (ED fluorophosphate, νd = 81.6) |
| L15 | Biconvex Positive | H-LAK53A (CDGM) / S-LAL8 class (OHARA) — lanthanum crown, code 729/547 |
| L16 | Biconvex Positive | ED phosphate crown, code 593/686 (probable S-FPM2 (OHARA) / CDGM equivalent) |
| L17 | Negative Meniscus | S-LAH55 (OHARA) / CDGM equivalent — dense lanthanum flint, code 806/333 |
| L18 | Pos. Meniscus (2× Asph) | PGM moldable crown, code 516/565 (unmatched — probable proprietary low-Tg borosilicate for glass molding) |
| L21 | Neg. Meniscus (2× Asph) | PGM moldable crown, code 516/565 (same as L18, L31) |
| L31 | Biconvex Positive (2× Asph) | PGM moldable crown, code 516/565 (same as L18, L21) |
| L32 | Negative Meniscus | H-K9L (CDGM) / N-BK7 (Schott) class, code 517/642 |
Detailed analysis available in the interactive viewer above.