Invention Grant
- Patent Title: Wide attachment, and image pickup lens and image pickup apparatus including same
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Application No.: US15638419Application Date: 2017-06-30
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Publication No.: US10409042B2Publication Date: 2019-09-10
- Inventor: Masakazu Kodaira
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Carter, DeLuca & Farrell LLP
- Priority: JP2016-133469 20160705
- Main IPC: G02B15/02
- IPC: G02B15/02 ; G02B15/12 ; G02B15/10
Abstract:
A wide attachment which is detachably attached to an object side of a lens apparatus and in which a focal length of the lens apparatus is shifted to a short focal length side. The wide attachment is formed of a single meniscus lens having a negative refractive power. The lens has an aspherical surface. The following conditional expressions are satisfied: −5.2
Public/Granted literature
- US20180011301A1 WIDE ATTACHMENT, AND IMAGE PICKUP LENS AND IMAGE PICKUP APPARATUS INCLUDING SAME Public/Granted day:2018-01-11
Information query
