Patent ID: 11953662
Assignee: RICOH COMPANY, LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. The zoom lens according to claim 1,
wherein the second sub-first lens group includes one or more negative lens components,
wherein a negative lens component closest to an image within the one or more negative lens components is a cemented lens composed of a negative lens and a positive lens and is a vibration-isolating lens group movable in the direction perpendicular to the optical axis to correct image blurring, and
wherein conditional expression (10) below is satisfied:

10<ν_A1N−ν_A1P  (10)

where
ν_A1N denotes an Abbe number of the negative lens of the negative lens component, and
ν_A1P denotes an Abbe number of the positive lens of the negative lens component.