Patent ID: 7221394

Claim:
A digital camera comprising: a solid state imaging device that has a light receiving surface, and is provided with an optical low-pass filter; a photographing optical system that forms an object image on said light receiving surface through said optical low-pass filter; and a storing unit that stores an electronic-charge accumulation-time control program for determining optimum exposure parameters according to which a photography is performed through said photographing optical system and said solid state imaging device, said electronic-charge accumulation-time control program having a program diagram showing a relationship between an electronic-charge accumulation-time and an aperture value and/or an ISO speed, said program diagram having at least one bending point at which said program diagram is bent; said electronic-charge accumulation-time T at a bending point which is close to the lowest luminous value of said program diagram satisfying the following formula, when a film-converted pixel pitch p (μm) of said solid state imaging device, which is defined by dividing a width of a photographing film by the number of pixels arranged in a horizontal direction of said light receiving surface, satisfies 4p≧60; 1/( f c ×(60/4 p ))≧ T≧ 1 /f c wherein f c indicates a film-converted focal length (mm), with which, when said light receiving surface is enlarged to an area of said photographing film, said object image is formed on the enlarged area with the same angle of view as that for said photographing film.