KineOptics Focuser HC-2 Helical Crayford 2"
245.68 $
Tax included
Helical focusers have traditionally been the solution for achieving a low-profile Newtonian focuser. However, they've often been plagued by issues like unwanted slop in the threads and inadequate travel rates for precise focusing. While most helical focusers have a single thread, limiting the travel per turn to about 0.125 inches, even those with multiple lead threads fall short of the required rate.