Adjusting apparatus for setting components able to be coupled to the adjusting apparatus, in particular for adjusting a reticle device of a telescopic sight, comprising: - an adjusting-cap device with an adjusting cap which, for mechanical actuation of the adjusting apparatus by way of a rotational movement, is mounted on a base part so as to be rotatable about an axis of rotation, - a coupling part which is configured to transmit an adjustment variable, resulting from the movement of the adjusting cap, to a component able to be connected to the coupling part, for the purpose of setting said component, - wherein, on a circumference about the axis of rotation, the adjusting cap has a lateral surface to which there is applied a scale which interacts with a position mark at the side of the base part, - wherein, in the lateral surface of the adjusting cap, the adjusting-cap device has a fastening groove which is formed along the circumference and in which at least one adjustable indicator element is fixed, said at least one adjustable indicator element rotating with the adjusting cap relative to the base part and marking a defined scale value of the scale, - wherein each of the indicator elements (21, 22, 23, 24) is able to arranged, by way of displacement, along the entire circumference of the fastening groove, characterized in that (a)the fastening groove is oriented parallel to the axis of rotation; and/or (b)the fastening groove and each of the indicator elements (21, 22, 23, 24) are arranged in a common indicator plane, to which the axis of rotation is oriented perpendicularly, so that multiple indicator elements (21, 22, 23, 24) are arranged in a single plane; and/or (c)the fastening groove is formed to have a negative dovetail shape and each of the indicator elements (21, 22, 23, 24) has a corresponding indicator foot with a positive dovetail shape, or the fastening groove is formed to have a negative T shape and each of the indicator elements (21, 22, 23, 24) has a corresponding indicator foot with a positive T shape. - an adjusting-cap device with an adjusting cap which, for mechanical actuation of the adjusting apparatus by way of a rotational movement, is mounted on a base part so as to be rotatable about an axis of rotation, - a coupling part which is configured to transmit an adjustment variable, resulting from the movement of the adjusting cap, to a component able to be connected to the coupling part, for the purpose of setting said component, - wherein, on a circumference about the axis of rotation, the adjusting cap has a lateral surface to which there is applied a scale which interacts with a position mark at the side of the base part, - wherein, in the lateral surface of the adjusting cap, the adjusting-cap device has a fastening groove which is formed along the circumference and in which at least one adjustable indicator element is fixed, said at least one adjustable indicator element rotating with the adjusting cap relative to the base part and marking a defined scale value of the scale, - wherein each of the indicator elements (21, 22, 23, 24) is able to arranged, by way of displacement, along the entire circumference of the fastening groove, (a)the fastening groove is oriented parallel to the axis of rotation; and/or (b)the fastening groove and each of the indicator elements (21, 22, 23, 24) are arranged in a common indicator plane, to which the axis of rotation is oriented perpendicularly, so that multiple indicator elements (21, 22, 23, 24) are arranged in a single plane; and/or (c)the fastening groove is formed to have a negative dovetail shape and each of the indicator elements (21, 22, 23, 24) has a corresponding indicator foot with a positive dovetail shape, or the fastening groove is formed to have a negative T shape and each of the indicator elements (21, 22, 23, 24) has a corresponding indicator foot with a positive T shape.