An endoscope includes a main unit, which includes a centring bush with an inner surface which defines an axis of rotation; a first eccentric bush, which is mounted rotatable about the axis of rotation in the centring bush and comprises a first centring inner surface which defines a first rotation axis, wherein the first rotation axis is offset parallel to the axis of rotation by a first offset; a second eccentric bush which is mounted rotatable about the first rotation axis in the first eccentric bush and comprises a second centring inner surface which defines a second rotation axis, wherein the second rotation axis is offset parallel to the first rotation axis by a second offset; and an eyepiece, which is connected to the second eccentric bush and has an optical axis which is parallel to the second rotation axis.