US 2004/0042087 A1, Embodiment 3 — Hideyasu Takato
| 16 ELEMENTS / 15 GROUPS |
| DESIGN f = 52.47–202.20 mm |
| DESIGN F/2.8–3.63 |
| ALL SPHERICAL |
| 3 ED ELEMENTS (MAKER) |
Infinity focus only. The patent focuses by moving the second group (L21–L22) toward the object but prints no close-focus spacings for this example, so focus is not modeled. Its Table 1 gives a G2 stroke of 0.102 × the tele focal length and a maximum magnification of −0.255×, which is not the marketed 1.2 m minimum focus distance and 0.21× maximum magnification.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | S-TIH53 (catalog equivalent; supplier unconfirmed) |
| L12 | Biconvex Positive | S-FPL51 (catalog equivalent; supplier unconfirmed) |
| L13 | Positive Meniscus | S-FSL5 (catalog equivalent; supplier unconfirmed) |
| L21 | Negative Meniscus | S-TIH53 (catalog equivalent; supplier unconfirmed) |
| L22 | Positive Meniscus | S-BSL7 (catalog equivalent; supplier unconfirmed) |
| L31 | Biconcave Negative | S-LAH58 (catalog equivalent; supplier unconfirmed) |
| L32 | Biconcave Negative | S-FSL5 (catalog equivalent; supplier unconfirmed) |
| L33 | Biconvex Positive | S-TIH53 (catalog equivalent; supplier unconfirmed) |
| L34 | Negative Meniscus | S-LAH66 (catalog equivalent; supplier unconfirmed) |
| L41 | Biconvex Positive | S-LAL14 (catalog equivalent; supplier unconfirmed) |
| L42 | Negative Meniscus | S-LAH53 (catalog equivalent; supplier unconfirmed) |
| L43 | Biconvex Positive | S-FPL51 (catalog equivalent; supplier unconfirmed) |
| L51 | Biconvex Positive | S-FPL51 (catalog equivalent; supplier unconfirmed) |
| L52 | Biconcave Negative | S-TIM22 (catalog equivalent; supplier unconfirmed) |
| L53 | Biconvex Positive | S-LAL7 (catalog equivalent; supplier unconfirmed) |
| L54 | Negative Meniscus | S-LAH55V (catalog equivalent; supplier unconfirmed) |