The invention relates to an adjusting device (1) for adjusting a telescopic sight (100), having a manually operable adjusting element (20) which is mounted rotatably about a rotation axis (A) relative to a base (10), between the base (10 ) and the adjusting element (20) a latching device (30) is arranged, which distributed over the circumference about the rotation axis (A) latching recesses (31), wherein a first latching element (32) of the latching device (30) in dependence on the rotational position of the Adjusting element (20) relative to the base (10) one of the latching recesses (31) facing, wherein the adjusting device (1) comprises a locking device (40) having a manually operable locking element (41) manually from a release position (S1) in a locking position (S2) is movable, wherein the locking element (41) via an actuating drive (50) with the first latching element (32) is coupled, and wherein the first latching element (32) in the Sperrstellu ng (S2) by means of the actuator (50) mechanically detected in the respective opposite latching recess (31) and a rotation of the adjusting element (20) relative to the base (10) is locked. The invention also relates to a telescopic sight (100) with such an adjustment device (1).
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