A CONTROLLER FOR AUTO-FOCUS IN A PHOTOGRAPHING APPARATUS

A photographing apparatus is provided that comprises a lens unit (1), a CCD (2), both of which are used to photograph a subject image, means for processing signal (40) to process output of the CCD (2) into a brightness signal and a color signal, and focus adjustment means (10). An AF evaluating-value obtaining a section (45) for the focus adjustment that obtains an AF evaluating value, which is changed depending on a frequency component of a subject, is provided after an edge emphasizing section (44) of a signal processing circuit.When performing focus control, with a plurality of sets of parameters for the edge emphasizing section (44) prepared, a plurality of frames are photographed by changing the set of the parameter, and then a difference between arbitrary two AF evaluating values from among a plurality of AF evaluating values obtained, is used to determine a focus moving amount.