1. A camera module comprising: an image capturing lens; an image sensor that receives light that passes through the image capturing lens; and an optical camera shake correction mechanism that shifts at least one of the image capturing lens and the image sensor in a normal direction with respect to an optical axis of the image capturing lens, depending on an angle at which a principal ray from an object is incident to the image capturing lens, wherein a size of an image that the image capturing lens forms is proportionate to the angle at which a principal ray from an object is incident to the image capturing lens, and y ∝θ where y is the size of the image that the image capturing lens forms and θ is the angle at which a principal ray from an object is incident to the image capturing lens.