US 3,006,249 — Walter Mandler
| 8 ELEMENTS / 6 GROUPS |
| 35.226 mm DESIGN EFL |
| f/2.0 |
| 62° PATENT FIELD |
Approximate unit focus from infinity to 0.7112 m: all elements move together away from the fixed image plane. Intermediate distances are interpolated.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | H-LaF3B (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L2 | Positive Meniscus | H-LaF3B (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L3 | Negative Meniscus | H-ZF1 (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L4 | Positive Meniscus | LAC10 (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L5 | Positive Meniscus | LAC10 (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L6 | Negative Meniscus | S-TIM35 (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L7 | Positive Meniscus | N-LAF21 (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |
| L8 | Positive Meniscus | H-LaF3B (coordinate-compatible dispersion proxy; historical supplier unconfirmed) |