JP 2003-344768 A — Akio Arakawa
| 13 ELEMENTS / 10 GROUPS |
| 200-500mm f/5-6.3 |
| 2 LD ELEMENTS |
| 2.5 m MOD |
| ALL SPHERICAL |
CONSTRAINED_RECONSTRUCTION: patent-specified rear group L6 translates imageward; close pairs are code-solved at the production 2.5 m MOD with the normalized image plane fixed and D20 + BF conserved.
| Element | Type | Glass |
|---|---|---|
| E1 | Positive Meniscus | 487702 class (vendor underdetermined) |
| E2 | Negative Meniscus | 834372 class (vendor underdetermined) |
| E3 | Biconvex Positive | 497816 class (vendor underdetermined) |
| E4 | Biconcave Negative | 773496 class (vendor underdetermined) |
| E5 | Biconvex Positive | 805254 class (vendor underdetermined) |
| E6 | Biconcave Negative | 805254 class (vendor underdetermined) |
| E7 | Biconvex Positive | 589612 class (vendor underdetermined) |
| E8 | Biconvex Positive | 497816 class (vendor underdetermined) |
| E9 | Biconvex Positive | 516641 class (vendor underdetermined) |
| E10 | Negative Meniscus | 834372 class (vendor underdetermined) |
| E11 | Negative Meniscus | 773496 class (vendor underdetermined) |
| E12 | Negative Meniscus | 697555 class (vendor underdetermined) |
| E13 | Positive Meniscus | 755275 class (vendor underdetermined) |