DE 1 497 540 A1 — Ikuo Mori
| 8 ELEMENTS / 7 GROUPS |
| f = 34.8707 mm DESIGN / 35 mm MARKETED |
| F/2.8 |
| 2ω = 75° PATENT FIELD |
| ±11 mm SHIFT / NO TILT |
NO_INTERNAL_RECONSTRUCTION: DE 1 497 540 A1 Example III publishes only the infinity prescription; no internal focus spacing is modeled. The 0.3 m catalog MFD is metadata from a later same-name Nikon manual and does not define a patent focus state.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | N-LAK7 catalog equivalent (patent 652585; production supplier unspecified) |
| L2 | Negative Meniscus | SSK2 catalog equivalent (patent 622531; production supplier unspecified) |
| L3 | Biconvex Positive | SF5 catalog equivalent (patent 673322; production supplier unspecified) |
| L4 | Biconvex Positive | LAC10 catalog equivalent (patent 720503; production supplier unspecified) |
| L5 | Negative Meniscus | K10 catalog equivalent (patent 501565; production supplier unspecified) |
| L6 | Biconcave Negative | SF10 catalog equivalent (patent 728283; production supplier unspecified) |
| L7 | Positive Meniscus | LAC8 catalog equivalent (patent 713539; production supplier unspecified) |
| L8 | Positive Meniscus | N-LAK7 catalog equivalent (patent 652585; production supplier unspecified) |