Refractor focuser from Celestron/Vixen C102 (I have upgraded to 2")
All metal, (except for knobs) much nicer than Chinese clones, very smooth with no backlash or image shift. Base fits inside 111mm tubes and could be machined for tubes as small as 93mm i.d. Chrome plated brass drawtube, 1.5/8" i.d., has 1.25" eyepiece holder plus an adapter that screws onto the drawtube that has SCT threads. With a 2" visual back (available for $20 from Telescope Warehouse) you could use 2" eyepieces with minimal, if any vignetting, due to the 1-5/8 i.d. drawtube. A very fine 6x30 finder attaches to the focuser and is included. $75 plus $5 shipping anywhere is continental U.S. Thanks, Bob.