JP 2013-250293 A — Masashi Yamashita, Mitsuaki Wada
| 20 LENS ELEMENTS / 13 GROUPS + PROTECTIVE GLASS |
| PATENT DESIGN EFL ≈ 779.921 mm |
| DESIGN f/5.658 |
| PUBLISHED 2ω = 3.147° |
| INNER FOCUS + VR |
PUBLISHED inner focus: G2 moves imageward. Patent d11/d16 values are retained at infinity, β=-0.033, and β=-0.155; the intermediate UI coordinate is derived from the verified conjugate distance, with no reconstructed internal spacing.
| Element | Type | Glass |
|---|---|---|
| HG | Protective Glass | J-BK7A (HIKARI) |
| L1 | Biconvex Positive | CaF2 fluorite (Nikon specifies two fluorite elements; patent 1.43382/95.13) |
| L2 | Biconvex Positive | CaF2 fluorite (Nikon specifies two fluorite elements; patent 1.43382/95.13) |
| L3 | Biconcave Negative | J-LAK10 (HIKARI) |
| L4 | Negative Meniscus, convex to object | J-LAK14 (HIKARI) |
| L5 | Positive Meniscus, convex to object | J-FKH1 (HIKARI) |
| L6 | Biconcave Negative | J-LASF02 (HIKARI) |
| L7 | Positive Meniscus, concave to object | J-LAFH3 (HIKARI) |
| L8 | Biconcave Negative | J-LAK14 (HIKARI) |
| L9 | Biconvex Positive | J-FK5 (HIKARI) |
| L10 | Plano-Concave Negative, concave to object | J-LAFH3 (HIKARI) |
| L11 | Biconvex Positive | J-K3 (HIKARI) |
| L12 | Biconcave Negative | J-LAK14 (HIKARI) |
| L13 | Positive Meniscus, concave to object | J-LF5 (HIKARI) |
| L14 | Biconcave Negative | J-FKH1 (HIKARI) |
| L15 | Biconvex Positive | J-F5 (HIKARI) |
| L16 | Negative Meniscus, concave to object | J-LASF021 (HIKARI) |
| FL | Plane-Parallel Plate | J-BK7 (HIKARI) |
| L17 | Biconvex Positive | J-KF6 (HIKARI) |
| L18 | Positive Meniscus, concave to object | J-FK5 (HIKARI) |
| L19 | Biconcave Negative | J-LASF09A (HIKARI) |
| L20 | Biconvex Positive | J-LF5 (HIKARI) |