JP 2022-140076 A — Yosuke Utagawa, Masaki Maruyama
| 14 ELEMENTS / 10 GROUPS |
| MARKETED 50 mm f/1.2 |
| DESIGN f = 53.90 mm / F1.21 |
| 2ω = 43.52° |
| 6 ASPHERICAL SURFACES |
Published double-floating focus: GR2 moves image-side 6.1293 mm and GR4 moves object-side 4.6776 mm from infinity to the patent near endpoint (d0 = 280 mm from the first surface, about 0.410 m object-to-IMG). The focus label follows this patent endpoint; Sony markets the minimum distance as 0.4 m.
| Element | Type | Glass |
|---|---|---|
| G1 | Biconcave Negative | 770297 class (supplier unresolved) |
| G2 | Biconvex Positive | 911353 class (supplier unresolved) |
| G3 | Negative Meniscus, convex to image | 730322 class (supplier unresolved) |
| G4 | Biconvex Positive (2x Asph) | M-TAFD405 — coordinate-compatible spectral proxy (supplier unresolved) |
| G5 | Positive Meniscus, convex to image | 986165 class (supplier unresolved) |
| G6 | Biconcave Negative | 593354 class (supplier unresolved) |
| G7 | Negative Meniscus, convex to object | 855252 class (supplier unresolved) |
| G8 | Biconvex Positive | 717480 class (supplier unresolved) |
| G9 | Biconcave Negative | 855252 class (supplier unresolved) |
| G10 | Biconvex Positive | 697555 class (supplier unresolved) |
| G11 | Biconvex Positive (2x Asph) | L-BAL35P — coordinate-compatible spectral proxy (supplier unresolved) |
| G12 | Biconvex Positive | 946180 class (supplier unresolved) |
| G13 | Biconcave Negative | 593354 class (supplier unresolved) |
| G14 | Negative Meniscus, convex to image (2x Asph) | 851401 class (supplier unresolved) |