Patent ID: 11947093
Assignee: FUJIFILM CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A variable magnification optical system consisting of, in order from an object side to an image side: a first lens group that has a positive refractive power; an intermediate group that includes a plurality of lens groups; and a subsequent group that includes a plurality of lens groups,
wherein in a first zooming mode, during zooming, a distance between the first lens group and the intermediate group changes, all distances between adjacent lens groups in the intermediate group change, a distance between the intermediate group and the subsequent group changes, and all distances between adjacent lens groups in the subsequent group are stationary,
in a second zooming mode, during zooming, the first lens group and all lens groups in the intermediate group remain stationary with respect to an image plane, and all the distances between the adjacent lens groups in the subsequent group change,
zooming in the first zooming mode and zooming in the second zooming mode are possible independently of each other, and
an intermediate real image is not formed in an entire zooming range.