US 4,432,615 A, Numerical Example 2 — Keiji Ikemori
| 15 ELEMENTS / 13 GROUPS |
| DESIGN f = 36.2-102 mm |
| DESIGN F/3.5 |
| ALL SPHERICAL |
Only the infinity focus state is modelled. The patent's front-group focusing movement and the macro setting are not reproduced. Canon lists 1.5 m as the production minimum focus distance.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | FD60 (Hoya equivalent) |
| L2 | Positive Meniscus | BACED5 (Hoya equivalent) |
| L3 | Positive Meniscus | LAC14 (Hoya equivalent) |
| L4 | Positive Meniscus | LAC14 (Hoya equivalent) |
| L5 | Negative Meniscus | TAFD5F (Hoya equivalent) |
| L6 | Negative Meniscus | S-LAH65 (Ohara equivalent) |
| L7 | Biconcave Negative | LAC14 (Hoya equivalent) |
| L8 | Biconvex Positive | PBH53 (Ohara equivalent) |
| L9 | Negative Meniscus | LAC14 (Hoya equivalent) |
| L10 | Biconvex Positive | LAC14 (Hoya equivalent) |
| L11 | Biconvex Positive | E-FEL2 (Hoya equivalent) |
| L12 | Plano-Concave Negative | S-LAH65 (Ohara equivalent) |
| L13 | Biconcave Negative | PBH53 (Ohara equivalent) |
| L14 | Positive Meniscus | BACD14 (Hoya equivalent) |
| L15 | Positive Meniscus | BACD14 (Hoya equivalent) |