An adapter (10) for pivoting a lens relative to an image sensor in a camera has lens-side and housing-side supporting rings (20, 30) that slide relative to one another by cylindrically curved sliding surfaces (22, 32) facing one another. A virtual cylinder axis (Z) of the sliding surfaces (22, 32) lies in a plane of the image sensor. A transmission lever (50) with first and second lever arms (51,52) is mounted on the lens-side supporting ring (20) and pivots about an axis (H) parallel to the virtual cylinder axis (Z). The first lever arm (51) extends in a circumferential direction on the lens side of the lever axis (H) and is coupled to an adjusting ring (42) mounted rotatably on the lens-side supporting ring (20). The second lever arm (52) extends axially of the housing side and is supported on an anchor (70) fixed to the housing-side supporting ring (30).