An adjusting device for an optical system has a first slider for a first optical element, which is arranged displaceably along an axial direction, a second slider for a second optical element, which is arranged displaceably along the axial direction, a control cam contour fixed in relation to the axial direction, a coupler between the first slider, the second slider and the cam contour, and a force element to exert force between the first slider and the second slider, so that the coupler is in contact with the first slider at a first point, is in contact with the second slider at a second point and is in contact with the control cam contour at a third point, the coupler including a first lever arm formed between the first and third points, and the coupler including a second lever arm formed between the second and third points.