US 2008/0112063 A1 — Takahiro Hatada
| 12 ELEMENTS / 10 GROUPS |
| PATENT EFL 56.9-241.3 mm |
| F/4.16-5.88 PATENT ENDPOINTS |
| 3-UNIT +/−/+ ZOOM; L2 IS UNIT |
| 1 UD-CLASS ELEMENT |
CONSTRAINED_RECONSTRUCTION: patent ¶0081 focuses by axial L1 motion only. At Canon's 1.1 m focal-plane-to-subject MFD, code solves L1 objectward by 15.5631 / 16.1731 / 16.3937 mm at wide / middle / tele while L2, L3, and the image plane remain fixed; tele paraxial magnification is 0.31037×.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | S-BSL7 (OHARA-equivalent; exact patent coordinate match) |
| L12 | Negative Meniscus | S-LAM66 (OHARA-equivalent; exact patent coordinate match) |
| L13 | Positive Meniscus | S-FPL51 (OHARA-equivalent; exact patent coordinate match) |
| L21 | Biconcave Negative | S-LAL8 (OHARA-equivalent; exact patent coordinate match) |
| L22 | Positive Meniscus | Unmatched (847239 high-index flint; patent vd=23.93; nearest OHARA S-TIH53WN vd=23.86) |
| L23 | Biconcave Negative | H-ZLaF50E (CDGM-equivalent; exact patent coordinate match) |
| L31 | Biconvex Positive | S-BSM18 (OHARA-equivalent; exact patent coordinate match) |
| L32 | Biconvex Positive | S-BSM14 (OHARA-equivalent; exact patent coordinate match) |
| L33 | Positive Meniscus | S-FSL5 (OHARA-equivalent; exact patent coordinate match) |
| L34 | Biconcave Negative | S-TIH53 (OHARA-equivalent; exact patent coordinate match) |
| L35 | Negative Meniscus | S-LAH60 (OHARA-equivalent; exact patent coordinate match) |
| L36 | Biconvex Positive | S-TIM28 (OHARA-equivalent; exact patent coordinate match) |