| http://www.w3.org/ns/prov#value | - In FIG. 2, B is a battery as a power supply source; 1 is a power supply circuit; 2 is a booster circuit comprising a DC/DC converter etc. in the circuit 1; 3 is a control circuit comprising a microcomputer including a RAM which controls camera operation and also memorizes data such as photographing conditions (shutter speed, aperture value, etc.) in the RAM; 4 is a display circuit using a liquid c
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