Title:
MOUNT ADAPTOR AND IMAGING DEVICE MAIN BODY
Document Type and Number:
Japanese Patent JP2017211397
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a mount adaptor and imaging device main body that can prevent a fall in resolution of an image pick-up element due to diffraction of light at a stop.SOLUTION: A mount adaptor 50 according to the present invention is configured to be mounted between a lens barrel 12 forming a first image circle C1, and an imaging device main body 13 having an image pick-up element 31 corresponding to a second image circle C2 smaller than the first image circle C1, and comprises: a wide conversion lens 22; and an amount-of-exposure adjustment unit. The wide conversion lens 22 is configured to vary a magnification of an optical image to be incident from the lens barrel 12. When a variable magnification is set to be β, a diameter of the first image circle is set to be D1, and a diameter of the second image circle is set to be D2, the wide conversion lens has a relation of D2/D1≤β<1. The amount-of-exposure adjustment unit is configured to adjust an amount of exposure to the image pick-up element 31 of the optical image.SELECTED DRAWING: Figure 5
Inventors:
KOIKE KAZUMI
SAIDA ARIHIRO
SAIDA ARIHIRO
Application Number:
JP2014202656A
Publication Date:
November 30, 2017
Filing Date:
September 30, 2014
Export Citation:
Assignee:
FUJIFILM CORP
International Classes:
G03B17/14; G03B7/091; G03B11/00; G03B17/56; H04N5/238; H04N5/243
Attorney, Agent or Firm:
Kobayashi International Patent Office