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Title:
TELEPHOTO LENS
Document Type and Number:
Japanese Patent JPS5219524
Kind Code:
A
Abstract:

PURPOSE: To prevent the occurrence of vignetting due to the movement of lens group in focusing without an increase of the diameter of a movable lens group.


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Inventors:
YOKOTA HIDEO
Application Number:
JP9511975A
Publication Date:
February 14, 1977
Filing Date:
August 05, 1975
Export Citation:
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Assignee:
CANON KK
International Classes:
G02B13/02; (IPC1-7): G02B9/60; G02B13/02



 
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