US 2018/0246292 A1 — Example 1
| 16 elements / 12 groups |
| 1 aspherical (2 surfaces) |
| 1 Super ED + 3 ED |
| Floating IF + 5-stop OIS |
Floating focus: G2 moves toward image, G3 moves toward object; G1 and G4 stationary. OIS via G4a lateral shift.
| Element | Type | Glass |
|---|---|---|
| L1a | Biconvex Positive | S-LAL18 (OHARA lanthanum crown) |
| L1b | Biconvex Positive | S-FPL51 (OHARA ED fluorophosphate) |
| L1c | Biconcave Negative | S-TIM35 (OHARA dense flint) |
| L1d | Biconvex Pos. (2× Asph) | S-BAL41 (OHARA barium crown) |
| L2a | Biconcave Negative | S-BSM2 (OHARA barium crown) |
| L2b | Negative Meniscus | Barium flint (nearest: HOYA NBFD3; no exact OHARA match) |
| L2c | Positive Meniscus | S-NPH5 (OHARA ultra-high-index dense flint, nd > 2.0) |
| L3a | Biconvex Positive | S-FPL55 (OHARA Super ED — calcium-fluoride equivalent) |
| L3b | Biconvex Positive | S-FPL51 (OHARA ED fluorophosphate) |
| L3c | Negative Meniscus | S-NPH4 (OHARA high-index dense flint) |
| L4aa | Positive Meniscus | S-NPH7 (OHARA ultra-high-index dense flint, nd > 2.0) |
| L4ab | Biconcave Negative | S-LAM66 (OHARA lanthanum crown) |
| L4ac | Negative Meniscus | S-FPM2 (OHARA fluorophosphate) |
| L4ba | Positive Meniscus | S-LAH79 (OHARA ultra-high-index lanthanum) |
| L4bb | Biconvex Positive | S-BSL7 / N-BK7 (standard borosilicate crown) |
| L4bc | Negative Meniscus | S-NPH53 (OHARA ultra-high-index dense flint, lowest νd in design) |
Detailed analysis available in the interactive viewer above.