JP 2013-140404 A — Numerical Example 1
| 19 elements / 14 groups |
| 72.20–290.00 mm design EFL |
| f/4.20–5.86 design aperture |
| 2 UD elements |
| All-spherical |
Canon specifies 1.2 m minimum focus; JP2013140404A Numerical Example 1 publishes only infinity-focus zoom spacings, so this transcription models zoom at infinity and keeps close-focus spacing entries equal to infinity values.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus (effectively plano-convex) | S-FSL5 (OHARA) |
| L2 | Negative Meniscus | KZFS-class short flint (Schott N-KZFS4 equivalent) |
| L3 | Positive Meniscus | S-FPL51 (OHARA) |
| L4 | Biconcave Negative | S-LAH55V (OHARA) |
| L5 | Biconcave Negative | S-BSM18 (OHARA) |
| L6 | Biconvex Positive | S-TIH53 (OHARA) |
| L7 | Biconvex Positive | S-FPL51 (OHARA) |
| L8 | Biconvex Positive | S-BSM14 (OHARA) |
| L9 | Negative Meniscus | S-LAH71 (OHARA) |
| L10 | Biconcave Negative | S-BAH27 (OHARA) |
| L11 | Biconvex Positive | S-TIH6 (OHARA) |
| L12 | Positive Meniscus | S-LAL14 (OHARA) |
| L13 | Biconvex Positive | S-BSM14 (OHARA) |
| L14 | Negative Meniscus | S-TIH53 (OHARA) |
| L15 | Positive Meniscus | S-LAH66 (OHARA) |
| L16 | Negative Meniscus | S-LAH58 (OHARA) |
| L17 | Positive Meniscus | S-TIH6 (OHARA) |
| L18 | Biconcave Negative | S-LAH58 (OHARA) |
| L19 | Biconvex Positive | S-TIM35 (OHARA) |
Detailed analysis available in the interactive viewer above.