US 2005/0286139 A1 — Numerical Fifth Embodiment
| 13 elements / 10 groups |
| 10-22mm f/3.5-4.5 |
| APS-C EF-S |
| 3 aspherical surfaces |
| Ring-type USM inner focus |
Patent publishes infinity zoom spacings only. Production lens uses Canon ring-type USM inner focusing; close-focus travel is not specified in this prescription.
| Element | Type | Glass |
|---|---|---|
| G11 | Negative Meniscus (1× Asph) | S-BAL42 (OHARA) |
| G12g | Biconcave Negative | S-LAH66 (OHARA) |
| G12r | Aspherical Resin Layer | UV-cured replica resin (patent medium N3) |
| G13 | Positive Meniscus | S-TIH10 (OHARA) |
| G21 | Negative Meniscus | S-LAH55V (OHARA) |
| G22 | Biconvex Positive | S-NSL36 (OHARA) |
| G23 | Biconvex Positive | S-NSL3 (OHARA) |
| G31 | Biconcave Negative | S-LAH65V (OHARA) |
| G32 | Biconvex Positive | S-TIH53 (OHARA) |
| N10 | Biconvex Positive | S-FPL51 (OHARA) |
| N11 | Biconcave Negative | S-LAH60 (OHARA) |
| N12 | Biconvex Positive | S-FPL53 (OHARA) |
| N13 | Negative Meniscus | S-LAH60 (OHARA) |
| N14 | Biconvex Positive (1× Asph) | Unmatched fluorophosphate crown (485700; nearest OHARA S-FSL5 class) |
Detailed analysis available in the interactive viewer above.