To make the most use of focus detection ability of a focus detection means by judging in which range among a plurality of areas detecting a focus can detect a focus based on the state of a lens side and outputting range data to a camera side.

An exchange lens 102 judges the focus detection possible range from distance information on a macro lens and sets focus detection possible (range) data. Data which are set and can detect the focus are communicated to an intra-camera CPU 108 through communication means 109 and 116. The intra-camera CPU 108 obtaining focus detection possible data selects focus detection information used for automatic focus control is selected among a plurality of focus detection information obtained in respective focus detection based on focus detection possible (range) data, generates lens driving information from selected focus detection information, outputs information to the exchange lens 102-side and controls the focus.