US 4,641,928 A — Yoshinari Hamanishi
| 14 ELEMENTS / 10 GROUPS |
| 100-300mm f/5.6 (marketed) |
| 102-294.784mm (patent zoom states) |
| 24deg20'-8deg10' (marketed picture angle) |
| 100mm MACRO TO 0.71m |
NO_INTERNAL_RECONSTRUCTION. The patent describes G1 focusing and coupled G1+G2 macro motion but publishes no quantitative close-focus spacings; the model therefore retains only the two published infinity zoom states. Nikon's 0.71 m minimum applies only to the 100 mm macro mode and is metadata, not a solved internal state.
| Element | Type | Glass |
|---|---|---|
| L11a | Negative Meniscus | 717295 - flint class (vendor unresolved) |
| L11b | Biconvex Positive | 487702 - S-FSL5 catalog equivalent (production supplier unspecified) |
| L12 | Positive Meniscus | 487702 - S-FSL5 catalog equivalent (production supplier unspecified) |
| L21a | Positive Meniscus | 805254 - dense flint class (vendor unresolved) |
| L21b | Biconcave Negative | 717481 - LAF3 catalog equivalent (production supplier unspecified) |
| L22a | Biconcave Negative | 713540 - J-LAK8 catalog equivalent (production supplier unspecified) |
| L22b | Positive Meniscus | 805254 - dense flint class (vendor unresolved) |
| L3a | Biconvex Positive | 518603 - BALK3 catalog equivalent (production supplier unspecified) |
| L3b | Negative Meniscus | 717295 - flint class (vendor unresolved) |
| L41 | Biconvex Positive | 501565 - K10 catalog equivalent (production supplier unspecified) |
| L42 | Negative Meniscus | 717295 - flint class (vendor unresolved) |
| L43 | Positive Meniscus | 517641 - BK7-class crown (vendor unresolved) |
| L44 | Negative Meniscus | 713540 - J-LAK8 catalog equivalent (production supplier unspecified) |
| L45 | Biconvex Positive | 575416 - J-LF7 catalog equivalent (production supplier unspecified) |