Automatic focus detecting means

摘要

An automatic focus condition detecting device comprising an objective lens; a unit for receiving light from an object through the objective lens; a focus detecting unit responsive to the output of the receiving unit for detecting a focusing condition of the objective lens; a unit responsive to the output of the receiving unit for judging whether or not it is possible for the focus detecting unit to detect a focusing condition of the objective lens; a lens position detecting unit for detecting whether or not the objective lens is positioned within a predetermined range included in the lens driving range; a unit for driving the objective lens; and a unit for controlling the driving unit to drive the objective lens when the judging judges that it is impossible for the focus detecting unit to detect a focusing condition and, moreover, the lens detecting unit detects that the objective lens is positioned within the predetermined range, for the purpose of a search a lens position where the focus detecting unit can detect a focusing condition.