JP 2008-145584 A Example 1 — Canon / Yokoyama
| 17 elements / 12 groups incl. filter; 16 powered elements rendered |
| f = 194.991 mm design; 200 mm marketed |
| F/2.05 design; f/2.0 marketed |
| All-spherical, fluorite + 2 UD-class elements |
| Inner focus + L32 optical image stabilization |
Inner focus by imageward translation of the negative L2 cemented doublet; paraxial close-focus reconstruction gives +12.560 mm travel at 1.9 m MFD.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive | S-FSL5 (OHARA) |
| L2 | Biconvex Positive (Fluorite) | CaF2 fluorite |
| L3 | Biconvex Positive (UD-class) | S-FPL51 (OHARA) |
| L4 | Biconcave Negative | S-NBH5 (OHARA) |
| L5 | Negative Meniscus | S-LAL14 (OHARA) |
| L6 | Positive Meniscus (UD-class) | S-FPL51 (OHARA) |
| L7 | Positive Meniscus | S-TIH53 (OHARA) |
| L8 | Biconcave Negative | S-LAH66 (OHARA) |
| L9 | Negative Meniscus | S-NBH5 (OHARA) |
| L10 | Biconvex Positive | S-LAH66 (OHARA) |
| L11 | Biconcave Negative | S-LAL14 (OHARA) |
| L12 | Positive Meniscus | S-TIH53 (OHARA) |
| L13 | Biconcave Negative | S-TIL2 (OHARA) |
| L14 | Biconvex Positive | S-LAL18 (OHARA) |
| L15 | Negative Meniscus | S-TIH6 (OHARA) |
| L16 | Positive Meniscus | S-LAH65V (OHARA) |
Detailed analysis available in the interactive viewer above.