US 2011/0102905 A1 Example 1 — Hiroki Harada / Nikon
| 17 elements / 11 groups |
| 56.09-293.90 mm design EFL |
| f/4.5-5.6 marketed maximum aperture |
| 2 ED elements / 1 HRI element |
| Front-group focus; G4 VR group |
Front-group focus: G1 moves objectward; close-focus spacings solved to reproduce Nikon's 1.4 m minimum focus distance and approximately 0.28x telephoto magnification.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive | 517/641 crown class (N-BK7 / S-BSL7 equivalent; vendor uncertain) |
| L12 | Negative Meniscus | S-TIH11 (OHARA) |
| L13 | Positive Meniscus | S-FPL51 / FCD1 class (ED fluorophosphate) |
| L21 | Biconcave Negative | S-LAL61 class (OHARA; patent vd rounded high) |
| L22 | Positive Meniscus | S-TIH53 (OHARA) |
| L23 | Negative Meniscus | S-LAH65V / S-LAH65VS class (OHARA) |
| L31 | Biconvex Positive | S-LAL14 / J-LAK14 class |
| L32 | Biconvex Positive | S-LAL14 / J-LAK14 class |
| L33 | Biconvex Positive | S-FPL51 / FCD1 class (ED fluorophosphate) |
| L34 | Biconcave Negative | S-LAH95 / 904-313 dense lanthanum flint class |
| L35 | Biconvex Positive | S-BAL41 (OHARA) |
| L41 | Negative Meniscus | S-LAH66 (OHARA) |
| L42 | Positive Meniscus | H-ZLaF80 / TAFD40 class (Hikari/Hoya; HRI) |
| L51 | Biconvex Positive | S-TIM22 (OHARA) |
| L52 | Negative Meniscus | S-LAL10 (OHARA) |
| L53 | Positive Meniscus | N-FK5 / J-FK5 / S-FSL5 class |
| L54 | Negative Meniscus | S-LAM66 (OHARA) |
Detailed analysis available in the interactive viewer above.