For sale - Van Slyke Engineering Newtonian Crayford focuser. Model NCF2. Includes the fine focus option. This is a 2" focuser with a built-in extention. Has the smoothest motion I've seen on a Crayford. Never been used. A very high quality focuser, but a bit heavy at 2.5 pounds. Original cost was $495. Asking $300 including shipping.