Sequential shooting controller
A sequential shooting controller includes both high and low load drive modes, and first and second power-voltage detectors. The high/low load drive modes drive a device under high/low loads. The first power-voltage detector detects a power-voltage by connecting a load. The second power-voltage detector detects the voltage across the device. The first power-voltage detector is actuated at the beginning of sequential shooting before a first image capturing operation starts. The high load image capturing operation starts when the voltage detected by the first power-voltage detector is higher than a first threshold. The low load image capturing operation starts when the voltage detected by the first power-voltage detector is lower than the first threshold. The second power-voltage detector is driven during a high load image capturing operation. The second power-voltage detector is disabled during a low load image capturing operation.
1. A sequential shooting controller, comprising:
a high load drive mode that drives a device used in an image capturing operation under a relatively high load condition;
a low load drive mode that drives said device under a relatively low load condition;
a first power-voltage detector that detects a voltage of an electric power source by connecting a load for monitoring the voltage of said electric power; and
a second power-voltage detector that detects the voltage of said electric power source by monitoring the voltage applied to said device;
said first power-voltage detector being actuated in the beginning or sequential shooting, which continuously carries out sequential image capturing operations, before a first image capturing operation starts;
an image capturing operation under said high load drive mode being started when the voltage of said power source detected by said first power-voltage detector is higher than a first threshold value and an image capturing operation under said low load drive mode being started when the voltage of said power source detected by said first power-voltage detector is lower than said first threshold value; and
said second power-voltage detector being driven during an image capturing operation under said high load drive mode is carried out and said second power-voltage detector being disabled while an image capturing operation under said low load drive mode is carried out.
2. A sequential shooting controller according to claim 1 , wherein the image capturing operation under said high load drive mode is continued when the voltage of said power source detected by said second power-voltage detector is higher than a second threshold value which is greater than said first threshold value.
3. A sequential shooting controller according to claim 2 , wherein the drive mode of the image capturing operation is switched to said low load drive mode when the voltage of said power source detected by said second power-voltage detector is lower than said second threshold value.
4. A sequential shooting controller according to claim 3 , wherein said first power-voltage detector is actuated after completion of the image capturing operation under said low load drive mode and at the beginning of a succeeding image capturing operation.
5. A sequential shooting controller according to claim 3 , wherein said first power-voltage detector is actuated at the beginning of a succeeding image capturing operation when the voltage of said power source is lower than said second threshold value, and when the voltage of said power source detected thereby is higher than a third threshold value which is lower than said second threshold value, the image capturing operation under said high load drive mode is continued.
6. A sequential shooting controller according to claim 5 , wherein the drive mode of the image capturing operation is switched to said high load drive mode when said sequential shooting is started under said low load drive mode and when the voltage of said power source detected by said first power-voltage detector actuated at the beginning of a succeeding image capturing operation is higher than said third threshold value.
7. A sequential shooting controller according to claim 5 , wherein the image capturing operation under said low load drive mode is continued when the voltage of said power source detected by said first power-voltage detector actuated during an image capturing operation under said low load drive mode after R second image capturing operation in said sequential shooting is higher than said third threshold value or a fourth threshold value that is lower than said third threshold value.
8. A sequential shooting controller according to claim 5 , wherein the image capturing operation is terminated when the voltage of said power source detected by said first power-voltage actuated during an image capturing operation under said low load drive mode after a second image capturing operation in said sequential shooting is lower than said fourth threshold value.
9. A sequential shooting controller according to claim 5 , wherein only the image capturing operation under said low load drive mode is carried out when the voltage of said power source detected by said first power-voltage detector actuated during an image capturing operation under said low load drive mode after a second image capturing operation in said sequential shooting is lower than said third threshold value.
10. A sequential shooting controller according to claim 8 , further comprising:
a warning processor that issues a warning with respect to a deficiency of said power source, said warning processor being actuated when the image capturing operation is terminated under conditions where the voltage of said power source detected by said first power-voltage detector actuated during an image capturing operation under said low load drive mode after a second image capturing operation in said sequential shooting is lower than said fourth threshold value.
11. A sequential shooting controller according to claim 1 , wherein said device comprises a motor for actuating a reflex mirror.
12. A sequential shooting controller according to claim 11 , wherein said second power-voltage detector is actuated during the rotation of said reflex mirror in a mirror-up position.