| 摘要 |
PROBLEM TO BE SOLVED: To reduce the diameter of a mount adapter for achieving insertion/extraction of a filter into/from an optical path.SOLUTION: A mount adapter 3A provided between a camera body and an interchangeable lens unit includes, within it, an optical filter 25 for changing optical characteristics of light being directed from the interchangeable lens unit to the camera body, and a turning shaft 24 that is provided at a location out of an optical path P and turns about a shaft perpendicular to an optical axis L. The optical filter 25 is inserted/extracted into/from the optical path P by turning the optical filter 25 around the rotary shaft 24. |
