JP 2016-161889 A, Example 1 — Akihiko Yuki
| 8 ELEMENTS / 6 AIR-SPACED COMPONENTS / 3 ZOOM GROUPS |
| f = 10.50-29.90 mm (PATENT) |
| F/2.06-5.01 (PATENT) |
| 5 ASPHERICAL SURFACES |
| 1-INCH-TYPE / 3:2 |
NO_INTERNAL_RECONSTRUCTION: Example 1 publishes zoom spacings only. Canon specifies 5 cm (wide) and 35 cm (tele) focus ranges measured from the lens end, but those values do not determine an internal optical trajectory; the data model therefore keeps focus spacings unchanged.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconcave Negative (2× Asph) | M-TAFD307 (coordinate-compatible spectral proxy; production supplier unspecified) |
| L12 | Positive Meniscus | E-FDS2 class (HOYA E-FDS2 coordinate equivalent; vendor unproven) |
| L21 | Positive Meniscus (2× Asph) | TAFD305 class (HOYA MP/MC-TAFD305 coordinate equivalent; vendor unproven) |
| L22 | Positive Meniscus | TAFD35 class (HOYA TAFD35 coordinate equivalent; vendor unproven) |
| L23 | Negative Meniscus | Unmatched (special high-dispersion glass; patent points to an SnO-rich JP2012-193065 class) |
| L25 | Biconcave Negative | 699301 class (multiple catalog equivalents; vendor unproven) |
| L26 | Biconvex Positive | TAFD35 class (HOYA TAFD35 coordinate equivalent; vendor unproven) |
| L31 | Biconvex Positive (1× Asph) | BACD15 class (HOYA MP-BACD15 coordinate equivalent; vendor unproven) |