US 5,621,575 Embodiment 6 — Fuji Photo Optical / Toyama
| 7 elements / 5 groups |
| 45mm f/4 |
| 2ω = 75.2° patent field |
| All spherical |
Unit-focus model: the patent gives only the infinity prescription; close focus is modeled by increasing BFD by 3.444 mm for a 0.7 m film-plane-to-subject distance.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | FC5 / N-FK5 class (487/704) |
| L2 | Biconvex Positive | NBFD3 (Hoya, 805/396; S-LAH63-class) |
| L3 | Biconcave Negative | FD110 (Hoya, 785/257; N-SF11 / S-TIH11 class) |
| L4 | Biconvex Positive | TAF1 (Hoya, 773/496; S-LAH66 / N-LAF34 class) |
| L5 | Biconcave Negative | E-FL5 (Hoya, 581/409; S-TIL25 class) |
| L6 | Positive Meniscus | TAF1 (Hoya, 773/496; S-LAH66 / N-LAF34 class) |
| L7 | Negative Meniscus | E-FL5 (Hoya, 581/409; S-TIL25 class) |
Detailed analysis available in the interactive viewer above.