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

Claim 3:
4. The variable magnification optical system according to claim 1,
wherein the subsequent group includes at least one lens group having a positive refractive power, and
in a case where a lens group having a strongest positive refractive power among lens groups that move during zooming in the second zooming mode is a SP lens group,
assuming that βSP is a lateral magnification of the SP lens group in a state where the variable magnification optical system focuses on an object at infinity and the variable magnification optical system is in a zooming state in which a focal length of the variable magnification optical system is shortest, Conditional Expression (1) is satisfied, which is represented by

−1<βSP<−0.1  (1).