Abstract: Seeker optics are provided for a missile seeker head, in particular a guided missile seeker head. The seeker optics contain an optical system having at least one optical element, which is aligned so as to be positioned with respect to an optical axis and is held in at least one optics frame. The optics frame contains an actively shape-variable substance by which the location of the at least one optical element in the optical system can be varied relative to the optical axis and/or by which the shape of the optical element can be adaptively varied.