Patent ID: 8873153
Filing Date: 2014-10-28
Classification: G02B

Abstract:
1. A camera apparatus to which a lens apparatus is attachable thereto and detachable therefrom, the camera apparatus comprising: an optical system; and an insertable/removable optical element that is insertable to and removable from an optical path of the optical system, wherein the insertable/removable optical element includes a convex surface giving the optical element a positive refractive power, wherein the optical system includes an optical element having a concave surface giving the optical system a negative refractive power, and wherein a paraxial image position of the optical system with the insertable/removable optical element removed from the optical path is in a side of the optical system with respect to an image pickup surface of the camera apparatus, and the paraxial image position of the optical system with the insertable/removable optical element inserted in the optical path is in a side opposite to the optical system side with respect to the image pickup surface.