US 6,320,698 B1 — Kenzaburo Suzuki
| 15 elements / 12 groups |
| 35-70mm f/2.8 |
| Patent EFL 36.0-68.5 mm |
| Patent FNO 2.85-2.86 |
| All-spherical |
| Nikon F / 135 full-frame |
Patent Table 3 gives infinity zoom spacings only; production close focus is 0.6 m normally and 0.28 m in macro mode at 35 mm, but no close-focus optical spacing is published.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | Dense flint (805255; S-TIH6/J-SF6 class) |
| L2 | Negative Meniscus | S-LAL52 (OHARA catalog equivalent for patent 670575 coordinate; production supplier unspecified) |
| L3 | Biconcave Negative | S-LAL52 (OHARA catalog equivalent for patent 670575 coordinate; production supplier unspecified) |
| L4 | Positive Meniscus | J-SFH2 class (HIKARI) |
| L5 | Negative Meniscus | J-SFH2 class (HIKARI) |
| L6 | Biconvex Positive | N-FK5 (SCHOTT) |
| L7 | Negative Meniscus | Dense flint (805255; S-TIH6/J-SF6 class) |
| L8 | Biconvex Positive | N-FK5 (SCHOTT) |
| L9 | Positive Meniscus | BALK3 (SUMITA catalog equivalent for patent coordinate; production supplier unspecified) |
| L10 | Positive Meniscus | J-SFH2 class (HIKARI) |
| L11 | Biconcave Negative | J-PKH1 class (HIKARI) |
| L12 | Biconcave Negative | J-PKH1 class (HIKARI) |
| L13 | Positive Meniscus | S-BAL35 class (OHARA) |
| L14 | Biconvex Positive | J-SK16 / N-SK16 class |
| L15 | Negative Meniscus | Dense flint (805255; S-TIH6/J-SF6 class) |