The reflector (1) is tippable around a pivot axis (10) and is coupled with gear mechanism for forced control of its tip angle. An alteration of the eye-piece angle by an amount alpha causes an alteration of the reflector tip angle by an amount equal to half alpha. The reflector comprises two even mirrors (2,3), which enclose an angle of 90 degrees and locate against each other in the angle vertex in a vertex line segment (4). The vertex line intersects the pivot axis vertically and locates in a set-up plane, through the axes (7,9) of the objective and ocular tubes. The two mirrors are symmetrical to this plane and the reflector body is made of glass. The reflector deflects the objective optical rays in the tube of the ocular (11).
