pulling device drive includes first and second shafts and the pulling device loops around the first and second shafts the body includes a receptacle adapted to interact with the first shaft and a support point adapted to rotatably dispose the body about an axis of rotation the lever arm extends from the body so that a spacing between the first and second shafts is modifiable by action of a force on the lever arm application_number US 37201809 A description it is an aspect of the present invention to provide an apparatus and a method that simplifies adjustment of the pulling means tension in a pulling means drive e g in a microscope the apparatus according to an embodiment of the present invention comprises a body and a lever arm extending therefrom after appropriate mounting of this apparatus on the pulling means drive of for example a microscope a rotation of the body about a rotation axis can be made available by means of a force impinging on the lever arm the spacing between the first and the second shaft of the pulling means drive is modifiable by rotating the body about the rotation axis such that the adjustment of the pulling means tension can be made available by a predetermined force impinging on the lever arm it is to be assumed in this context with no limitation as to generality that the second shaft is arranged in stationary fashion whereas the location of the first shaft is modifiable by means of the apparatus according to the present invention any other relative displacement of the two shafts is however likewise possible various problems occurring in the existing art are solved with the apparatus according to an embodiment of the present invention since the apparatus may be.