WO2020/105104 EXAMPLE 1 — NIKON / KEN UEHARA
| 21 ELEMENTS / 18 GROUPS |
| f = 71.5–196 mm |
| F/2.88 |
| 2ω = 33.8°–12.3° |
| 2 ASPHERICAL SURFACES |
Dual-group inner focus: G7 (neg.) moves toward image, G8 (pos.) moves toward object. Equal ±11.5 mm travel at tele. Multi-focusing via two STM motors.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | S-LAH99 / TAFD55 (001-291) |
| L12 | Plano-Convex Positive | S-FPL51 — ED (498-826) |
| L13 | Positive Meniscus | CaF₂ Fluorite (434-952) |
| L21 | Negative Meniscus | S-PHM53 or equiv. (603-654) |
| L22 | Biconcave Negative | S-FPL51 — ED (498-826) |
| L23 | Positive Meniscus | Nikon SR glass (proprietary) |
| L24 | Biconcave Negative | S-FPL51 — ED (498-826) |
| L31 | Positive Meniscus | FDS18 (HOYA) / H-ZF88 (946-180) |
| L41 | Biconvex Positive | S-FPL51 — ED (498-826) |
| L42 | Positive Meniscus | S-FPL51 — ED (498-826) |
| L51 | Biconcave Negative | N-SF66 / E-FDS1 (923-209) |
| L52 | Biconvex Positive | S-FPL51 — ED (498-826) |
| L61 | Negative Meniscus | Dense flint (850-324, no exact match) |
| L62 | Biconvex Positive (1× Asph) | PCD51 (HOYA) / J-PSKH4 (593-670) |
| L63 | Negative Meniscus | S-TIM2 / N-F2 (620-364) |
| L64 | Positive Meniscus | Dense flint (801-349, no exact match) |
| L71 | Positive Meniscus | FDS18 (HOYA) / H-ZF88 (946-180) |
| L72 | Negative Meniscus | S-LAL8 / N-LAK8 (713-540) |
| L81 | Biconvex Positive | J-LASFH9A / ~S-LAH93 (903-358) |
| L91 | Neg. Meniscus (1× Asph) | S-BSL7 / N-BK7 (517-641) |
| L92 | Negative Meniscus | S-BAL41 / N-SK11 (564-607) |
Detailed analysis available in the interactive viewer above.