JP S51-63635 — Rinzo Watanabe, Ellis I. Betensky
| 15 ELEMENTS / 10 GROUPS |
| 70-210mm (PATENT 70-205mm) |
| f/3.5 (PATENT 1:3.65) |
| MACRO 1:2.2 / 80 mm WORKING DISTANCE |
| ALL-SPHERICAL |
Group I unit focus to about 2 m from the image plane; tele-end macro focus by equal objectward movement of Groups II and III at fixed 6.000 mm separation.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | SF1 (SUMITA legacy catalog; HIKARI J-SF1 equivalent) |
| L2 | Biconvex Positive | SK5 (SUMITA legacy catalog; HIKARI J-SK5 equivalent) |
| L3 | Positive Meniscus | BK1 (SUMITA legacy catalog; OHARA BSL1 equivalent) |
| L4 | Biconvex Positive | SF11 (SUMITA legacy catalog; HIKARI J-SF11 equivalent) |
| L5 | Biconcave Negative | BAF11 (SUMITA legacy catalog; HIKARI J-BAF11 equivalent) |
| L6 | Biconcave Negative | BAF11 (SUMITA legacy catalog; HIKARI J-BAF11 equivalent) |
| L7 | Biconcave Negative | K5 (SUMITA legacy catalog) |
| L8 | Positive Meniscus | F1 (SUMITA legacy catalog; HIKARI J-F1 equivalent) |
| L9 | Biconvex Positive | FK5 class (SUMITA legacy / HIKARI J-FK5) |
| L10 | Negative Meniscus | SF6 (SUMITA legacy catalog; HIKARI J-SF6 equivalent) |
| L11 | Positive Meniscus | FK5 class (SUMITA legacy / HIKARI J-FK5) |
| L12 | Biconvex Positive | FK5 class (SUMITA legacy / HIKARI J-FK5) |
| L13 | Biconcave Negative | BAF9 (SUMITA legacy catalog) |
| L14 | Negative Meniscus | LAFN2 (SUMITA legacy; OHARA S-LAM59 equivalent) |
| L15 | Biconvex Positive | LF2 (SUMITA legacy catalog; OHARA PBL22 equivalent) |