a power switch etc the second shutter release switch in the shutter release switches is not only to instruct shooting but also to switch the position of the first reflection mirror 51 between the inside and outside of the shooting optical path the mode change switch is to switch over between the shooting mode and an image display mode the power supply circuit 92 is provided for converting the voltage of the battery 93 as a power source and supplying a voltage necessary for each circuit unit of the camera system the following describes the basic shooting operation of the camera according to the first embodiment of the present invention with reference to timing charts of fig4 and 5 fig4 is a timing chart for explaining the operation of the camera in the live view mode according to the first embodiment of the present invention fig5 is a timing chart for explaining the operation of the camera in the finder mode according to the first embodiment of the present invention in the timing charts of fig4 and 5 ae denotes automatic exposure af is auto focus exp is an actual exposure mu and md are the withdrawal and recovery of the first reflection mirror 51 sc is shutter charge e 1 is exposure information c is image capturing imaging p is image processing p 1 is an image captured by the image pickup device 67 for image capturing and d 1 is an image captured by the image pickup device 61 for image display respectively the.