US 2022/0236544 A1 Example 1 — FUJIFILM / Ryosuke Nagami
| 11 elements / 9 groups |
| f=35-70mm; design EFL 36.05-67.89mm |
| F4.5-5.6 variable maximum aperture |
| 1 aspherical element / 2 aspherical surfaces |
| 2 ED elements |
| Inner focus: G3 / GMr |
Inner focus: the entire third group G3 / rear middle subgroup GMr (L31-L32) moves toward the image plane for close focus; G1, G2, and G4 remain fixed during focusing.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | FD60 / FD60-W (Hoya, 805-255 dense flint) |
| L12 | Negative Meniscus | M-BACD12 / MC-BACD12 class (Hoya, 583-595) |
| L13 | Plano-Concave Negative | FC5 / N-FK5 class (487-704 fluorocrown) |
| L14 | Positive Meniscus | TAFD35L / TAFD35 (Hoya, 911-353 high-index tantalum flint) |
| L21 | Biconvex Positive | FCD1 (Hoya, 497-816 ED; S-FPL51 class) |
| L22 | Neg. Meniscus (2× Asph) | M-BACD12 / MC-BACD12 class (Hoya, 583-595 moldable crown) |
| L23 | Biconcave Negative | E-CF6 (Hoya, 517-522 crown-flint) |
| L24 | Biconvex Positive | FCD1 (Hoya, 497-816 ED; S-FPL51 class) |
| L31 | Negative Meniscus | LAC12 (Hoya, 678-555 lanthanum crown) |
| L32 | Negative Meniscus | E-FD2 (Hoya, 648-338 flint) |
| L41 | Plano-Convex Positive | Light flint 581-408 class (CDGM H-QF50A / Ohara S-TIL25 / Hoya E-FL5 equivalent) |
Detailed analysis available in the interactive viewer above.