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US Patent 11187877 Zoom lens and imaging apparatus

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Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
11187877
Date of Patent
November 30, 2021
Patent Application Number
16542097
Date Filed
August 15, 2019
Patent Citations Received
‌
US Patent 11640049 Zoom lens and imaging apparatus
3
Patent Primary Examiner
‌
James R Greece
Patent abstract

A zoom lens consists of, in order from an object side, a focusing group, a zoom group, and a subsequent group. The focusing group consists of, in order from the object side, a front focusing group which does not move with respect to the image plane during zooming and focusing, a middle focusing group which consists of one or two positive lens groups each moving during focusing, and a rear focusing group which consists of a negative lens group moving during zooming and focusing. The rear focusing group has a zoom range in which the amount of movement during focusing changes in accordance with the zoom position and the rear focusing group moves to the image side during focusing from the object at infinity to the closest object. Predetermined conditional expressions relating to the amount of movement of the rear focusing group are satisfied.

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