CN 205427291 U Example 2 — Anhui ChangGeng / Zhang Xiaohua
| 12 ELEMENTS / 9 GROUPS |
| f = 16.00 mm |
| F/4.1 |
| 2ω = 110.4° |
| ALL SPHERICAL |
Dual-group floating focus: SF (L1–L6) moves 2.71 mm and MF (stop + L7–L9) moves 12.41 mm toward object. Patent max 0.78×; production extends to 1:1 at MFD 0.122 m (~5 mm working distance).
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | H-LAK7 (CDGM) |
| L2 | Negative Meniscus | H-ZLAF2 (CDGM) |
| L3 | Negative Meniscus | S-LAH95 / TAFD25 class (904313) |
| L4a | Biconvex Positive | H-ZF52 (CDGM) |
| L4b | Negative Meniscus | H-LAK5A (CDGM) |
| L5 | Biconvex Positive | S-LAH95 / TAFD25 class (904313) |
| L6 | Biconvex Positive | H-QK3L (CDGM) |
| L7a | Biconvex Positive | H-K9L (CDGM) |
| L7b | Negative Meniscus | H-LAF3 (CDGM) |
| L8 | Biconvex Positive | H-ZF1 (CDGM) |
| L9a | Negative Meniscus | S-LAH95 / TAFD25 class (904313) |
| L9b | Biconvex Positive | H-QK3L (CDGM) |
Detailed analysis available in the interactive viewer above.