Abstract: A photographing apparatus is provided that includes: a connector including a first terminal that is electrically connected to an external device; a first resistor that is electrically connected to the first terminal via a first node; and an external device recognizing unit that recognizes a type of the external device according to a voltage level of the first node, wherein a voltage level of the first node is determined according to a voltage distribution of the first resistor and a second resistor included in the external device.

Abstract: A photographing apparatus is provided that includes: a connector including a first terminal that is electrically connected to an external device; a first resistor that is electrically connected to the first terminal via a first node; and an external device recognizing unit that recognizes a type of the external device according to a voltage level of the first node, wherein a voltage level of the first node is determined according to a voltage distribution of the first resistor and a second resistor included in the external device.

Abstract: A flash controlling apparatus is provided including a light receiving unit PS, a current-to-voltage converter IVC, a comparator CR, and a micro-controller MC. The light receiving unit PS generates a current signal corresponding to the flash intensity of a camera. The current-to-voltage converter IVC converts the current signal received from the light receiving unit PS into a voltage signal SPS. The comparator CR compares the voltage signal SPS with a reference voltage VREF to obtain a resultant logic signal SCOM. The micro-controller MC controls the operation of the current-to-voltage converter IVC and controls the operation of a flash device of the camera according to the resultant logic signal SCOM received from the comparator CR. The voltage signal SPS from the current-to-voltage converter IVC has the characteristics of a logarithmic function with respect to time.

Abstract: A flash controlling apparatus is provided including a light receiving unit PS, a current-to-voltage converter IVC, a comparator CR, and a micro-controller MC. The light receiving unit PS generates a current signal corresponding to the flash intensity of a camera. The current-to-voltage converter IVC converts the current signal received from the light receiving unit PS into a voltage signal SPS. The comparator CR compares the voltage signal SPS with a reference voltage VREF to obtain a resultant logic signal SCOM. The micro-controller MC controls the operation of the current-to-voltage converter IVC and controls the operation of a flash device of the camera according to the resultant logic signal SCOM received from the comparator CR. The voltage signal SPS from the current-to-voltage converter IVC has the characteristics of a logarithmic function with respect to time.

Abstract: A control circuit for operating a camera in the B shutter mode includes a microcontroller for computing an appropriate film exposure time period based on a measurement of ambient light in a scene to be photographed. Under the control of a user-actuated shutter switch, the microcontroller opens the camera shutter, counts off the computed exposure time period, and closes the shutter at the end thereof. The control circuit includes the capability of permitting the user to compensate the computed exposure time period, abort the computed exposure time period, end the computed exposure time period prematurely, and select an exposure time period in place of the computed exposure time period. Exposure times are displayed to facilitate user compensation, premature conclusion, and independent selection of the film exposure time period, in order to facilitate successful practice of time exposure photography.