US 5,751,485 — Kenzaburo Suzuki
| 8 ELEMENTS / 7 GROUPS |
| DESIGN f = 59.9998 mm |
| F/2.82 |
| 2ω = 39.4° |
| 1:1 CLOSE FOCUS |
Published focus states: G1 and G2 move toward the object; G3 remains fixed.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | J-LASFH2-class (coordinate-compatible spectral proxy; supplier unproven) |
| L2 | Positive Meniscus | LAF3-class (coordinate-compatible spectral proxy; supplier unproven) |
| L3 | Negative Meniscus | S-TIM1-class (coordinate-compatible spectral proxy; supplier unproven) |
| L4 | Biconcave Negative | E-FD15-class (coordinate-compatible spectral proxy; supplier unproven) |
| L5 | Biconvex Positive | S-LAL8-class (coordinate-compatible spectral proxy; supplier unproven) |
| L6 | Biconvex Positive | J-LASFH2-class (coordinate-compatible spectral proxy; supplier unproven) |
| L7 | Biconvex Positive | S-TIM22-class (coordinate-compatible spectral proxy; supplier unproven) |
| L8 | Biconcave Negative | NBFD2-class (coordinate-compatible spectral proxy; supplier unproven) |