WO 2017/138250 A1 EXAMPLE 2 — SONY / HOSOI
| 12 ELEMENTS / 9 GROUPS |
| f ≈ 50.3 mm |
| F/1.4 |
| 2ω ≈ 46.4° |
| 2 ASPHERICAL SURFACES |
| 1 ED ELEMENT |
Inner focus — GR2 (L21 + L22, 2 elements) translates axially; GR1 and GR3 fixed. Ring Drive SSM.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | S-BAH28 (OHARA) |
| Lp1 | Biconvex Positive (1× Asph) | High-index lanthanum crown, 851/401 class (uncertain) |
| Ln1 | Biconcave Negative | S-BSL7 (OHARA) |
| Ln2 | Biconcave Negative | S-TIH1 (OHARA) |
| Lp2 | Biconvex Positive | S-LAL18 (OHARA) |
| Lp3 | Biconvex Positive | Fluorophosphate crown, 593/686 class (uncertain) — ED glass |
| L21 | Biconcave Negative | Ultra-high-index lanthanum-niobium heavy flint, 995/293 class (uncertain) |
| L22 | Biconvex Positive | Ultra-high-dispersion titanium heavy flint, 946/179 class (uncertain) |
| L31 | Biconvex Positive | S-LAH65V (OHARA) |
| L32 | Biconvex Positive | S-LAH65V (OHARA) |
| L33 | Biconcave Negative | S-TIH6 (OHARA) |
| L34 | Neg. Meniscus (1× Asph) | S-BAL42 (OHARA) |
Detailed analysis available in the interactive viewer above.