JP 2003-329924 A — Yuichi Muramatsu
| 14 ELEMENTS / 11 GROUPS |
| PATENT f = 176.9587 mm; DATA SCALED TO 180 mm |
| F/3.5 (PATENT FNO 3.536) |
| 2ω = 14° |
| 2 LD ELEMENTS |
| 1:1 AT 0.47 m |
Floating internal focus: LG1 and the stop remain fixed; LG2 moves imageward, LG3 moves objectward, and LG4 moves slightly objectward from infinity to 1:1. Five patent air gaps are interpolated between the endpoint states.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | S-FSL5 (OHARA) |
| L2 | Positive Meniscus | S-FPL51 (OHARA) |
| L3 | Biconcave Negative | S-LAH60 (OHARA) |
| L4 | Biconvex Positive | S-FPL51 (OHARA) |
| L5 | Negative Meniscus | S-LAM2 (OHARA) |
| L6 | Positive Meniscus | S-BSL7 (OHARA) |
| L7 | Biconcave Negative | S-LAL14 (OHARA) |
| L8 | Negative Meniscus | S-LAL14 (OHARA) |
| L9 | Positive Meniscus | S-TIH53 (OHARA) |
| L10 | Biconvex Positive | S-BAL35 (OHARA) |
| L11 | Biconvex Positive | S-BAL35 (OHARA) |
| L12 | Negative Meniscus | S-TIH10 (OHARA) |
| L13 | Biconcave Negative | S-TIL6 (OHARA) |
| L14 | Positive Meniscus | S-BAH10 (OHARA) |