US 2001/0006433 A1, Embodiment 1 — Hiroyasu Ozaki
| 11 ELEMENTS / 9 GROUPS |
| DESIGN f = 103.00–290.04 mm |
| DESIGN F/4.8–6.0 |
| ALL SPHERICAL |
Front-group focusing to 1.5 m: ¶0058 describes focusing by moving the whole first group (G1), but Table 1 prints no close-focus spacings. The model covers zooming at infinity only; optical spacings remain unchanged with the focus control. At 290 mm, moving G1 about 19 mm toward the object reaches the published 1.5 m minimum focus distance at 0.26×, the published maximum magnification; this travel is calculated, not printed.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | S-FSL5 (catalog equivalent; supplier unconfirmed) |
| L2 | Negative Meniscus | S-TIH6 (catalog equivalent; supplier unconfirmed) |
| L3 | Positive Meniscus | S-FSL5 (catalog equivalent; supplier unconfirmed) |
| L4 | Negative Meniscus | S-LAM2 (catalog equivalent; supplier unconfirmed) |
| L5 | Positive Meniscus | S-TIH6 (catalog equivalent; supplier unconfirmed) |
| L6 | Biconcave Negative | S-LAH65 (catalog equivalent; supplier unconfirmed) |
| L7 | Biconvex Positive | S-LAL7 (catalog equivalent; supplier unconfirmed) |
| L8 | Biconvex Positive | S-BSL7 (catalog equivalent; supplier unconfirmed) |
| L9 | Biconcave Negative | S-TIH53 (catalog equivalent; supplier unconfirmed) |
| L10 | Biconvex Positive | S-TIH6 (catalog equivalent; supplier unconfirmed) |
| L11 | Negative Meniscus | S-LAH65 (catalog equivalent; supplier unconfirmed) |