| http://www.w3.org/ns/prov#value | - In flash photography, to avoid an excessively dark image of the main subject such as a person or persons and the background, natural exposure of the background is first carried out with an aperture value set by the aperture dial 11 to ensure appropriate exposure and flash exposure of the main subject is carried out with the aperture value computed from the metered distance to the subject and the g
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