JP H11-211978 A — Yasunori Murata, Makoto Misaka
| 11 ELEMENTS / 9 GROUPS |
| 35 mm MARKETED / 34.2948 mm DESIGN |
| f/1.4 MARKETED / f/1.45 DESIGN |
| 2ω = 64° |
| 1 ASPHERICAL SURFACE |
| 0.30 m MFD |
PUBLISHED floating focus: L1 remains fixed; d6 changes 5.20→0.43 mm and d13 changes 3.70→2.06 mm. L2 moves 4.77 mm objectward and L3 plus the stop moves 6.41 mm objectward at the 300 mm state. BF 38.6533555→45.0633555 mm is computed only to preserve the fixed image plane.
| Element | Type | Glass |
|---|---|---|
| E1 | Negative Meniscus | 583594/595 class (vendor unresolved) |
| E2 | Negative Meniscus | 583594/595 class (vendor unresolved) |
| E3 | Biconvex Positive | 713538/539/540 class (vendor unresolved) |
| E4 | Biconvex Positive | 713538/539/540 class (vendor unresolved) |
| E5 | Negative Meniscus | 516641/642 class (vendor unresolved) |
| E6 | Positive Meniscus | 835427 class (vendor unresolved) |
| E7 | Negative Meniscus | S-TIM27 coefficient proxy (patent 640345; production supplier unspecified) |
| E8 | Biconcave Negative | 805254/255 class (vendor unresolved) |
| E9 | Biconvex Positive (1× Asph) | 835427 class (vendor unresolved) |
| E10 | Positive Meniscus | 773496 class (vendor unresolved) |
| E11 | Positive Meniscus | 773496 class (vendor unresolved) |