US Patent 7557831 Optical apparatus provided with image-shake correction function

It is an object of the present invention to provide an optical apparatus which can avoid the movement of an unnatural image by an image-shake correction function. An optical apparatus comprises a controller which performs an image-shake correcting control based on a signal generated by using an output of a shake detector which detects a shake. The controller performs filtering processing and integrating processing to the signal. The controller changes a cutoff frequency in the filtering processing and the integration constant according to the information on a focal length of an image-taking optical system which forms an object image and information on the object distance.