Patent ID: 7440007

Claim:
An image-taking apparatus comprising: an image-taking optical system including an offset lens unit movable in a direction orthogonal to an optical axis of the image-taking optical system; an image-pickup element which photoelectrically converts an image of an object formed by the image-taking optical system; and a memory which stores adjustment data on a movement amount of the offset lens unit to make light amounts in peripheral parts on the image-pickup element substantially homogeneous in a case where the object has a surface with approximately homogeneous luminance, wherein the following condition is satisfied: 0.1<|(1− βi )× βr|< 10.0 where βi represents a paraxial lateral magnification of the offset lens unit, βr represents a paraxial lateral magnification of the lens system placed further on an image surface side than the offset lens unit, and βr is equal to 1 in a case of not having the lens system.