1. A finder apparatus which is used together with a photographing apparatus, comprising: a finder configured to present an image of a subject so as to be visually recognizable by an operator; and positioning marker presentation member configured to present a marker for positioning for setting relative positions of the photographing apparatus and an object for calibration to the finder so as to be visually recognizable by the operator, when the object for calibration including at least one of a known shape and a known surface attribute is photographed to acquire a parameter of a photographing optical system of the photographing apparatus.