| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a zoom lens system, an interchangeable lens unit and a camera system capable of satisfactorily correcting chromatic aberration and achieving a high optical performance.SOLUTION: The zoom lens system, the interchangeable lens unit and the camera system include from the object side to the image side: a first negative lens group including one or more positive lens elements; a second positive lens group including one or more negative lens elements; and a following lens group including an aperture diaphragm. The following lens group includes a lens group closest to the image, which is fixed at focusing. The first focusing lens group is disposed between the aperture diaphragm and the lens group closest to the image. The following conditions, 1.0<L/{f×tan(ω)}<2.6 and 0.8<L/f<2.8, are satisfied, in which Lis a distance on the optical axis from the aperture diaphragm to an imaging plane at a wide angle end, fis a focal distance at a telephoto end,ωis a half field angle at the telephoto end, Lis a distance on the optical axis between the lens element closest to the image in the first lens group and a lens element closest to the object in the second lens group at the wide angle end, and fis a focal distance at the wide angle end.</p> |
