US 2023/0341664 A1 — Example 1
| 55mm f/1.7 |
| 14 elements / 10 groups |
| 2 aspherical + 2 ED elements |
| G mount / 44×33 format |
Inner focusing: the eight-element G2 focus unit, including the aperture stop, moves 11.19 mm toward the object; G1 and G3 remain fixed relative to the image plane.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | FF5 (HOYA, 593-354 code) |
| L12 | Positive Meniscus | S-LAH98 (OHARA) / TAFD45 class |
| L21 | Positive Meniscus | TAFD65 (HOYA, 051-269 code) |
| L22 | Biconvex Positive | FCD1 (HOYA) / S-FPL51 class |
| L23 | Biconcave Negative | S-NBH58 (OHARA) |
| L24 | Positive Meniscus (2× Asph) | 772493 — molded lanthanum-crown class (no exact public catalog match) |
| L25 | Biconcave Negative | E-F1 (HOYA) / S-TIM1 class |
| L26 | Biconvex Positive | FCD515 / FCD505 class (HOYA, 593-686 code) |
| L27 | Biconcave Negative | S-NBH58 (OHARA) |
| L28 | Biconvex Positive | TAFD40 / J-LASFH17 class (001-255 code) |
| L31 | Biconvex Positive | J-LASFH22 (HIKARI, 849-438 code) |
| L32 | Biconcave Negative | E-F8 (HOYA) / S-TIM8 class |
| L33 | Negative Meniscus | E-FEL2 (HOYA) / S-TIL2 class |
| L34 | Negative Meniscus (2× Asph) | M-FD80 / E-FD8 class (HOYA 689-312, close match) |
Detailed analysis available in the interactive viewer above.