US 8,970,966 B2 Example 2 — Canon / Maetaki
| 6 ELEMENTS / 4 GROUPS |
| f ≈ 39.0 mm |
| F/2.8 |
| 2ω ≈ 58.0° |
| 1 ASPHERICAL SURFACE (GMo) |
Unit focus (patent model). Production lens uses STM rear/inner focus.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | S-LAH55V (OHARA) |
| L12 | Biconcave Negative | S-TIL25 (OHARA) |
| L13 | Positive Meniscus | S-LAL14 (OHARA) |
| L21 | Biconcave Negative | S-TIM35 (OHARA) |
| L22 | Biconvex Positive | S-LAH55V (OHARA) |
| L23 | Pos. Meniscus (1× Asph) | S-BAL42 (OHARA) |
Detailed analysis available in the interactive viewer above.