An apparatus for capturing an object scene, in particular a seeking head for target-tracking missiles, such that, with a detector 86 in fixed relationship with a structure, it is possible to capture a large spatial angle. For that purpose the imaging optical system (30) has a system portion (28) facing the object scene which is pivotable with a pitch frame (24) about a pitch axis (26) perpendicular to a roll axis (18). The pitch frame (24) is mounted pivotably about the pitch axis (26) in a roll frame (16) which is supported in the structure (10) rotatably about the roll axis (18). The system portion (28) includes first beam deflection structure (36) by which the imaging beam path of the imaging optical system (30) is deflectable in a direction along the pitch axis (26). The imaging optical system (30) further includes second beam deflection structure (52) which are rotatable with the roll frame (16) and by which the deflected beam path is picked up along the pitch axis (26) and deflected in the direction of the roll axis (18). The detector (86) is arranged on the roll axis (18).