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1. (WO2016052420) MOUNT ADAPTER AND IMAGING DEVICE BODY

Pub. No.:    WO/2016/052420    International Application No.:    PCT/JP2015/077346
Publication Date: Fri Apr 08 01:59:59 CEST 2016 International Filing Date: Tue Sep 29 01:59:59 CEST 2015
IPC: G03B 17/14
G03B 7/091
G03B 11/00
G03B 17/56
H04N 5/238
H04N 5/243
Applicants: FUJIFILM CORPORATION
富士フイルム株式会社
Inventors: KOIKE, Kazumi
小池 和己
SAITA, Arihiro
齋田 有宏
Title: MOUNT ADAPTER AND IMAGING DEVICE BODY
Abstract:
Provided are a mount adapter and an imaging device body that can prevent a decrease in the resolving power of an imaging element caused by light diffraction at the diaphragm. A mount adapter (50) is mounted between a lens barrel (12) and an imaging device body (13). The lens barrel (12) forms a first image circle C1. The imaging device body (13) contains an imaging element (31) corresponding to a second image circle C2 that is smaller than the first image circle C1. The mount adapter (50) is equipped with a wide conversion lens (22) and an exposure adjustment unit. The wide conversion lens (22) performs variable magnification on an optical image that enters from the lens barrel (12). The variable magnification β of the wide conversion lens (22) satisfies the formula D2/D1 ≤ β < 1, where D1 represents the diameter of the first image circle and D2 represents the diameter of the second image circle. The exposure adjustment unit adjusts the amount of exposure of the optical image to the imaging element (31).