US 3,560,079 EXAMPLE 1 — NIPPON KOGAKU / WAKIMOTO & SHIMIZU
| 7 ELEMENTS / 5 GROUPS |
| f ≈ 50.0 mm |
| F/1.4 |
| 2ω ≈ 46° |
| ALL SPHERICAL |
Unit focus — entire optical assembly translates along the optical axis. 7-blade aperture diaphragm.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | SF2 / NSL36 (dense flint) |
| L2 | Positive Meniscus | LaK9 / LAL7 (lanthanum crown) |
| L3 | Negative Meniscus | SF4 / PBM5 (dense flint) |
| L4 | Negative Meniscus | SF6 / PBM6 (dense flint) |
| L5 | Positive Meniscus | LaK8 / LAL14 (lanthanum crown) |
| L6 | Positive Meniscus | SK16 / BSL7 (barium crown) |
| L7 | Biconvex Positive | LaK8 / LAL14 (lanthanum crown) |
Detailed analysis available in the interactive viewer above.