Rotatable drive device for scope turret or other optic turret

An apparatus including 1) a spindle or other first rotatable part to adjust an optical or electronic element of an aiming device or other optical device and 2) a knob or other second rotatable part to rotate the spindle or other first rotatable part, the apparatus comprising:

• a rotatable drive device having a rear end, a front end, and a length, the length arranged along an axis that is 1) non-coincident with an axis of rotation of the spindle or other first rotatable part, or of the knob or other second rotatable part, the non-coincident axis 2) spaced apart from the axis of rotation;
• and
• an adjustment device operably coupled to the rotatable drive device;
• the rotatable drive device to translate the adjustment device linearly along a guide hole responsive to rotation of the rotatable drive device from a first position to a second position;
• the adjustment device to:
• in a first position in the guide hole, cause the spindle or other first rotatable part and the knob or other second rotatable part to rotate together as a unit, and
• in a second different position in the guide hole, disengage the knob or other second rotatable part from the spindle or other first rotatable part to allow the knob or other second rotatable part to rotate relative to the spindle or other first rotatable part.