US 4,758,073 Example 4 — Moskovich / Vivitar Corp.
| 14 ELEMENTS / 10 GROUPS |
| f = 72.1–203.8 mm |
| F/2.89–4.01 |
| 2ω ≈ 33.4–12.2° |
| ALL SPHERICAL |
Front-group unit focus. G1 extends forward for close focus; G2 and G3 stationary during focus.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | 785261 — dense flint (SF56A / SF11 class) |
| L2 | Biconvex Positive | FK5 (Schott) / S-FSL5 (Ohara) |
| L3 | Positive Meniscus | FK5 (Schott) / S-FSL5 (Ohara) |
| L4 | Positive Meniscus | 834373 — dense flint (M-NBFD10 catalog match; S-LAH60/LaSF5 class) |
| L5 | Biconcave Negative | S-LAH66 (OHARA) |
| L6 | Biconcave Negative | S-BSM81 (OHARA) |
| L7 | Positive Meniscus | SF6 (Schott) / S-TIH6 (Ohara) |
| L8 | Biconvex Positive | FK5 (Schott) / S-FSL5 (Ohara) |
| L9 | Positive Meniscus | SK5 (Schott) |
| L10 | Biconvex Positive | FK5 (Schott) / S-FSL5 (Ohara) |
| L11 | Biconcave Negative | SF6 (Schott) / S-TIH6 (Ohara) |
| L12 | Biconvex Positive | F5 (Schott) / S-TIM5 (Ohara) |
| L13 | Negative Meniscus | 834373 — dense flint (M-NBFD10 catalog match; S-LAH60/LaSF5 class) |
| L14 | Biconvex Positive | SF14 (Schott) / S-TIH14 (Ohara) |
Detailed analysis available in the interactive viewer above.