Title:
ズームレンズ及びそれを有する撮像装置
Document Type and Number:
Japanese Patent JP6552530
Kind Code:
B2
Abstract:
A zoom lens including in order from an object side: a positive first unit configured not to move for zooming; a negative second unit configured to move to the image side for zooming to a telephoto end; and a relay lens unit configured not to move for zooming, wherein the first unit consists of five lenses including, in order from the object side, a negative lens, a positive lens, a positive lens, a positive lens and a positive lens, or six lenses including, in order from the object side, a positive lens, a negative lens, a positive lens, a positive lens, a positive lens and a positive lens, and a refractive index of the negative lens in the first unit, an Abbe number of the negative lens, a focal length of the negative lens, and a focal length of the first lens unit are appropriately set.
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Inventors:
Masaru Sakamoto
Application Number:
JP2017007596A
Publication Date:
July 31, 2019
Filing Date:
January 19, 2017
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/167; G02B13/18; G02B15/20
Domestic Patent References:
| JP2011081063A | ||||
| JP2014215586A |
Foreign References:
| US20050259330 |
Attorney, Agent or Firm:
Okabe
Takao Ochi
Koji Yoshizawa
Masami Saito
Takao Ochi
Koji Yoshizawa
Masami Saito