Abstract: A rotary device (1) is provided for an optic tomograph, with the sample carrier (4) with the object (5) to be examined being rotational around a predetermined axis (6) of the object, with the rotary device (1) having a rotary module (8; 15), which can cause a rotation around a first rotary axis (10), a first positioning module (7) connected to the rotary module (8), by which the first rotary module (8; 15) can be positioned along the first rotary axis (10), and a second positioning module (9; 11; 12; 16; 17) connected to the rotary module (8; 15), at which the sample carrier (4) with the object (5) to be examined can be fastened, allowing the axis (6) of the object to be positioned in reference to the first rotary axis (10) by the second positioning module (9; 11, 12; 16; 17) such that a rotation of the rotary module (8; 15) rotates the object (5) around the axis (6) of the object.