JP 2010-164839 A — Yoshifumi Sudoh
| 8 ELEMENTS / 6 GROUPS |
| 6.0 mm |
| f/1.9 marketed / f/1.99 patent design |
| 2ω = 78.2° |
| 2 ASPHERICAL SURFACES |
NO_INTERNAL_RECONSTRUCTION: JP 2010-164839 A Example 4 publishes only the infinity prescription. The production GR DIGITAL IV reaches approximately 0.01 m in macro mode from the lens front, but no internal focus movement is reconstructed here.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | S-FPL51 (OHARA) |
| L2 | Neg. Meniscus (1× Asph) | L-BSL7 (OHARA) |
| L3 | Biconvex Positive | S-LAH65 (OHARA) |
| L4 | Positive Meniscus | S-FPL51 (OHARA) |
| L5 | Negative Meniscus | S-TIM35 (OHARA) |
| L6 | Negative Meniscus | S-NBH5 (OHARA) |
| L7 | Biconvex Positive | S-FPL51 (OHARA) |
| L8 | Biconvex Positive (1× Asph) | L-BSL7 (OHARA) |