US 2013/0222925 A1 — Tatsuyuki Onozaki, Masakazu Saori
| 11 ELEMENTS / 9 GROUPS |
| f = 90.116 mm (DESIGN) |
| F/2.85 (DESIGN) |
| 2ω = 42.2° |
| 0.5x AT 0.413 m |
| 1 ASPHERICAL SURFACE |
PUBLISHED two-group floating focus. From infinity to -0.50:1, G1 and G2 move objectward by 35.368 mm and 29.090 mm; D15 changes 5.680-11.958 mm and BFD changes 69.090-98.180 mm.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | 835427 - high-index lanthanum glass class (vendor unresolved) |
| L12 | Positive Meniscus | 806333 - high-index lanthanum flint class (vendor unresolved) |
| L13 | Biconvex Positive | 497816 - ED fluorophosphate crown class (vendor unresolved) |
| L14 | Biconcave Negative | 640346 - E-FD7/S-TIM27-class dense flint (code equivalent) |
| L15 | Positive Meniscus | 805255 - dense flint class (vendor unresolved) |
| L16 | Biconcave Negative | 728283 - dense flint class (vendor unresolved) |
| L17 | Biconvex Positive | 497816 - ED fluorophosphate crown class (vendor unresolved) |
| L18 | Biconvex Positive (1x Asph) | 806407 - high-index lanthanum glass class (vendor unresolved) |
| L21 | Negative Meniscus | 640346 - E-FD7/S-TIM27-class dense flint (code equivalent) |
| L22 | Biconvex Positive | 806333 - high-index lanthanum flint class (vendor unresolved) |
| L23 | Biconcave Negative | 569560 - barium crown class (vendor unresolved) |