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

Claim 14:
15. The zoom lens according to claim 1,
wherein the positive second-first lens component of the second sub-second lens group 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 expressions (13) and (14) below are satisfied:

10<ν_B1P−ν_B1N  (13)

40<ν_B1P  (14)

where
ν_B1P denotes an Abbe number of the positive lens of the positive second-first lens component, and
ν_B1N denotes an Abbe number of the negative lens of the positive second-first lens component.