Patent ID: 7630621
Filing Date: 2009-12-08
Classification: G02B,G03B,H04N

Abstract:
1. An interchangeable lens camera in which a lens unit is detachably attached to a camera body, said lens unit including a solid-state image sensor for taking a subject image having passed through an imaging optical system, said interchangeable lens camera comprising: A. said camera body including: an auxiliary-light emitter for emitting auxiliary light to be used for autofocus; a first memory for storing first information representing spectral characteristics of said auxiliary light; a first communication section for communicating various signals with said lens unit; a first controller for controlling operations of the respective parts of said camera body, said first controller reading said first information from said first memory and sending said first information to said lens unit via said first communication section; B. said lens unit including: a focus-evaluation-value calculator for calculating a focus evaluation value representing sharpness of said subject image; a second memory for storing second information representing spectral characteristics of each of color signals; a selector for changing the color signal to be inputted into said focus-evaluation-value calculator; a second communication section for communicating the various signals with said camera body via said first communication section; and a second controller for controlling operations of the respective parts of said lens unit, said second controller comparing said first information, which is received from said camera body via said second communication section, with said second information stored in said second memory, and said second controller operating said selector such that the color signal corresponding to said second information identical with said first information is inputted into said focus-evaluation-value calculator.