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

Claim 4:
5. The variable magnification optical system according to claim 1, wherein the subsequent group includes at least one lens group having a negative refractive power,
assuming that
fS is a focal length of the subsequent 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, and
fSN is a focal length of a lens group having a strongest negative refractive power among lens groups that move during zooming in the second zooming mode,
Conditional Expression (2) is satisfied, which is represented by

0<fS/|fSN|<4  (2).