Focus condition indicating device of an auto-focus system

摘要

A device for indicating the current focus condition of an auto-focus system for use in a camera and the like includes an indication processing circuit interposed between an arithmetic processing circuit, which receives distance information to an object of interest, and an indicator/controller. The indication processing circuit allows to maintain the detected in-focus condition sufficiently long so that an observer can judge the proper focus condition even if the object is in slight motion, or the camera is being held by hands.