US 2014/0285903 A1 — Takashi Suzuki
| 8 ELEMENTS / 6 GROUPS |
| f ≈ 36.17 mm |
| F/1.45 |
| 2ω ≈ 43° |
| 2 ASPHERICAL SURFACES |
Unit focus — all lens groups move together, only BFD changes. Simple mechanism preserves aberration correction across focus range.
| Element | Type | Glass |
|---|---|---|
| L11 | Positive Meniscus | S-LAH97 (OHARA) |
| L12 | Positive Meniscus | S-LAH65VS (OHARA) |
| L13 | Negative Meniscus | S-TIM35 (OHARA) |
| L14 | Negative Meniscus | S-TIM5 (OHARA) |
| L21 | Biconcave Negative (2× Asph) | D-K59 (CDGM catalog equivalent; production supplier unspecified) |
| L22 | Plano-Convex | S-LAH58 (OHARA) |
| L23 | Negative Meniscus | S-TIH14 (OHARA) |
| L24 | Positive Meniscus | S-LAH58 (OHARA) |