1. An image blur prevention apparatus comprising: an image blur prevention device that prevents image blur; a predicting portion that anticipates a movement of at least one camera component, the movement of which is responsive to operation of an operating portion of a camera and generates a shock fluctuation; and a control device that controls said image blur prevention device so as to limit a range of operation of said image blur prevention device at a time when said predicting portion anticipates a movement of the at least one camera component that generates a shock fluctuation.