US 2009/0190220 A1 — Haruo Sato
| 14 ELEMENTS / 10 GROUPS |
| 85 mm |
| f/3.5 MARKETED / FNO 3.6 DESIGN |
| 18°50′ DX |
| 1.0× • 1 ED • IF • VR |
PUBLISHED dual-group internal focus: G2 moves toward the image while G3 moves toward the object; the data stores the patent infinity and beta=-1.0 endpoints, while the published beta=-0.5 station is retained in the audit. Patent beta=-1.0 normalizes to 0.26419491 m object-to-image distance; Nikon markets 0.286 m MFD from the focal plane.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | S-LAH66 (OHARA catalog equivalent; production supplier unspecified) |
| L12 | Positive Meniscus | S-LAL14 (OHARA catalog equivalent; production supplier unspecified) |
| L13 | Biconcave Negative | S-TIH1 (OHARA catalog equivalent; production supplier unspecified) |
| L14 | Positive Meniscus | J-LAF01 (HIKARI catalog equivalent; production supplier unspecified) |
| L21 | Negative Meniscus | N-BK7 (SCHOTT catalog equivalent; production supplier unspecified) |
| L22 | Biconcave Negative | N-BK7 (SCHOTT catalog equivalent; production supplier unspecified) |
| L23 | Positive Meniscus | J-SF03 (HIKARI catalog equivalent; production supplier unspecified) |
| L31 | Biconvex Positive | N-BK7 (SCHOTT catalog equivalent; production supplier unspecified) |
| L32 | Negative Meniscus | E-FD4 (HOYA catalog equivalent; production supplier unspecified) |
| L33 | Biconvex Positive | J-FKH1 (HIKARI catalog equivalent; production supplier unspecified) |
| L41 | Biconcave Negative | S-LAH60 (OHARA catalog equivalent; production supplier unspecified) |
| L42 | Positive Meniscus | J-SF03 (HIKARI catalog equivalent; production supplier unspecified) |
| L51 | Negative Meniscus | S-NSL3 (OHARA catalog equivalent; production supplier unspecified) |
| L52 | Biconvex Positive | S-LAH51 (OHARA catalog equivalent; production supplier unspecified) |