Non-telescoping riflescope adjustment mechanism

The present invention relates to adjustment mechanisms for sighting devices such as riflescopes and, in particular, to a non-telescoping adjustment mechanism, including a scale that indicates the number of rotations of the adjustment mechanism. A non-telescoping adjustment mechanism for adjustment of a riflescope or other sighting device includes a core that is rotatable about a central axis of the adjustment mechanism and an adjustment knob, which is rigidly coupled to the core and which extends from a housing of the riflescope to a protrusion distance. Rotating the adjustment knob causes the core to rotate for adjusting an adjustable member within the riflescope. An index slide, threadably coupled to the adjustment knob, reciprocates along the central axis between the adjustment knob and the core in response to rotation of the adjustment knob. A scale, positioned on the adjustment mechanism, provides a visual indication of the degree of adjustment applied to the riflescope through multiple turns of the adjustment knob. The indication is achieved without increasing the protrusion distance of the adjustment knob.