JP 2012-63403 A — Numerical Example 2
| 19 elements / 13 groups |
| f = 149.99 mm design / 150 mm nominal |
| F2.92 design / F2.8 nominal |
| 2ω = 16.4° |
| 3 SLD-class FCD1 elements |
| All spherical |
| Dual floating internal focus; OS group L5 |
Dual floating internal focus: L2 moves toward the image while L3 moves toward the object; L1, the stop, L4, L5, and L6 remain fixed axially.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | BACED5 (Hoya; barium dense crown) |
| L12 | Biconvex Positive | FCD1 (Hoya; SLD/ED fluorocrown) |
| L13 | Plano-Concave Negative | FD60 (Hoya; dense flint) |
| L14 | Biconvex Positive | FCD1 (Hoya; SLD/ED fluorocrown) |
| L15 | Biconcave Negative | TAF1 (Hoya; tantalum/lanthanum flint) |
| L21 | Negative Meniscus | TAC8 (Hoya; tantalum crown) |
| L22 | Positive Meniscus | FDS90 (Hoya; special dense flint) |
| L23 | Biconcave Negative | FC5 (Hoya; fluorocrown) |
| L24 | Biconcave Negative | TAC8 (Hoya; tantalum crown) |
| L31 | Biconvex Positive | TAC8 (Hoya; tantalum crown) |
| L32 | Biconvex Positive | FCD1 (Hoya; SLD/ED fluorocrown) |
| L33 | Negative Meniscus | FD60 (Hoya; dense flint) |
| L41 | Biconcave Negative | E-FD8 (Hoya; flint) |
| L51 | Biconvex Positive | FD60 (Hoya; dense flint) |
| L52 | Biconcave Negative | TAC8 (Hoya; tantalum crown) |
| L53 | Biconcave Negative | LAC8 (Hoya; lanthanum crown) |
| L61 | Biconvex Positive | M-NBFD130 (Hoya; 806/407 dense niobium flint match) |
| L62 | Biconcave Negative | E-FD4 (Hoya; dense flint) |
| L63 | Positive Meniscus | NBFD10 (Hoya; dense niobium flint) |
Detailed analysis available in the interactive viewer above.