Described is a filter apparatus having an activated carbon molded body with a honeycomb structure. An image processing request for image processing of one of the first and second functions is received. A preferable interval is disposed in the optical axis direction by a positioning section which is disposed in each flange section. In response to a force directed against the body, the tension force is overcome, permitting vertical movement of the fence dip along the T-post and corresponding vertical movement of the carried fence wire to increase the distance between adjacent fence wires to permit crossing the fence.