Title:
OPTICAL SYSTEM WITH BUILT-IN CONVERTER
Document Type and Number:
Japanese Patent JP2019070689
Kind Code:
A
Abstract:
To provide an optical system with built-in converter capable of instantly switching the angle of view 3 positions or more.SOLUTION: The optical system has at least two built-in converters configured to switch the focal length of the entire system between the long focal distance side and the short focal distance side. The optical system satisfies the following conditions, and the object side vertex of the converter at the short focal distance side is disposed closer to the object side than the object side vertex of the converter at the long focal distance side. 0.95
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Inventors:
SUGITA SHIGENOBU
Application Number:
JP2017195536A
Publication Date:
May 09, 2019
Filing Date:
October 06, 2017
Export Citation:
Assignee:
CANON KK
International Classes:
G02B15/10; G02B13/02; G02B15/12
Attorney, Agent or Firm:
Yukio Takanashi