WO 2021/200206 A1 Example 2
| 17 elements / 14 groups |
| f = 12.36-23.28 mm design |
| F/2.91 design, f/2.8 marketed |
| 2ω = 120.4°-85.7° design |
| 8 aspherical surfaces |
Floating inner focus: GP2 and GP4 move independently; d11/d14 and d19/d22 change with focus while the back focal distance remains fixed at each zoom position.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus (2x Asph) | D-ZK2 / SK crown class (PGM, 586/595) |
| L12 | Negative Meniscus (2x Asph) | M-TAF1 class (PGM lanthanum flint, 772/492) |
| L13 | Biconcave Negative | FCD705 class (ED phosphate crown, 552/755) |
| L14 | Biconcave Negative | S-FPL53 / FCD100 class (Super ED fluorophosphate, 438/951) |
| L15 | Biconvex Positive | Unmatched (dense lanthanum flint, 856/323) |
| L21 | Negative Meniscus | Unmatched (ultra-dense short flint, 930/240) |
| L22 | Biconvex Positive | 678322 — dense flint (Schott SF-family adjacent; no exact public catalog match) |
| L31 | Negative Meniscus | Unmatched (ultra-dense lanthanum flint, 961/323) |
| L32 | Positive Meniscus (2x Asph) | PCD51 class (low-dispersion crown, 594/670) |
| L41 | Negative Meniscus | Unmatched (ultra-dense lanthanum flint, 961/323) |
| L42 | Biconvex Positive | FCD705 class (ED phosphate crown, 552/755) |
| L51 | Positive Meniscus | Unmatched (ultra-dense short flint, 903/204) |
| L52 | Negative Meniscus | Unmatched (ultra-dense lanthanum flint, 961/323) |
| L53 | Biconvex Positive | S-FPL53 / FCD100 class (Super ED fluorophosphate, 438/951) |
| L54 | Negative Meniscus | Unmatched (ultra-high-index lanthanum flint, 009/291) |
| L55 | Negative Meniscus (2x Asph) | D-ZLaF85 class (lanthanum flint, 856/401) |
| L56 | Biconvex Positive | S-FPL51 / FCD1 / N-PK52A class (ED fluorophosphate, 498/816) |
Detailed analysis available in the interactive viewer above.