Spectra Astro-Accessories SureSharp focuser in excellent condition. Sure Sharp ($65). T-mount adapter for Nikon or Canon or Pentax(screw mount) are available ($25).
For information see webpage for an explanation of how the Sure Sharp works email me.
Sure Sharp is best for final fine focusing of camera using a star. Once the scope is focused on a nearby star, the scope is then moved to frame the object to be photographed. This is a great system for focusing a camera!
Buyer pays shipping in CONUS. Cashier's check or USPS money order only.