US 2011/0090576 A1 — Shigenobu Sugita
| 15 ACTIVE ELEMENTS / 11 GROUPS |
| f = 584.82 mm (MODELED) |
| F/4.12 DESIGN |
| 2ω = 4.24° |
| 2 FLUORITE ELEMENTS |
CONSTRAINED_RECONSTRUCTION: patent-published internal focus by cemented L16 moving image-side; close state solved at Canon's 4.5 m MFD with +20.112105824866635 mm L16 travel and fixed image plane.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | S-FSL5 (OHARA) |
| L12 | Biconvex Positive | Optical fluorite / CaF2 |
| L13 | Biconcave Negative | 835427 high-index lanthanum class (vendor unresolved; patent theta_gF = 0.5636) |
| L14 | Biconvex Positive | Optical fluorite / CaF2 |
| L15 | Negative Meniscus | S-FSL5 (OHARA) |
| L16a | Biconvex Positive | S-TIH6 (OHARA) |
| L16b | Biconcave Negative | 835427 high-index lanthanum class (vendor unresolved; patent theta_gF = 0.5636) |
| L21a | Negative Meniscus | S-LAH60 (OHARA) |
| L21b | Biconvex Positive | L-LAM60 (OHARA) |
| L22a | Biconvex Positive | S-TIH53 (OHARA) |
| L22b | Biconcave Negative | 720502 lanthanum-crown class (vendor unresolved; patent theta_gF = 0.5535) |
| L23 | Negative Meniscus | S-LAH60 (OHARA) |
| L24 | Positive Meniscus | S-TIH53 (OHARA) |
| L25a | Positive Meniscus | S-NBH51 (OHARA) |
| L25b | Negative Meniscus | S-NPH2 (OHARA) |