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

Claim 6:
7. The variable magnification optical system according to claim 1, wherein in a state where the variable magnification optical system focuses on an object at infinity and where the variable magnification optical system is in a zooming state in which a focal length of the variable magnification optical system is shortest,
assuming that
a focal length of the variable magnification optical system is fw, and
a sum of a distance on an optical axis from a lens surface closest to the object side in the variable magnification optical system to a lens surface closest to the image side in the variable magnification optical system and a back focal length of the variable magnification optical system at an air conversion distance is TL,

Conditional Expression (4) is satisfied, which is represented by

1<TL/fw<100  (4).