US 7,411,746 B2 Embodiment 1 — Hoya / Kato & Saori
| 8 elements / 5 groups |
| f = 21.60 mm design; 21 mm nominal |
| F3.2 marketed; F3.3 patent design |
| 68° diagonal production field |
| 1 hybrid aspherical surface |
| Two-group floating focus |
Two-group floating focus: front group and rear group move objectward by unequal amounts.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | S-LAL14 (OHARA equivalent) |
| L2 | Negative Meniscus | S-LAH65V (OHARA equivalent) |
| L3 | Negative Meniscus | S-LAH66 (OHARA equivalent) |
| L4 | Positive Meniscus / Near Plano-Convex | S-TIM35 (OHARA equivalent) |
| L5 | Positive Meniscus | S-LAL18 (OHARA equivalent) |
| L6 | Plano-Concave Negative | S-TIH13 (OHARA equivalent) |
| L7 | Plano-Convex Positive | S-BSM15 (OHARA equivalent) |
| L8r | Aspheric Resin Layer | Compound UV-curing resin (patent; no catalog glass match) |
| L8 | Positive Meniscus | S-LAH66 (OHARA equivalent) |
Detailed analysis available in the interactive viewer above.