Howie Glatter 1.25″ TuBLUG for Newtonian Laser Collimators

Use with a regular laser collimator in single beam mode to perform barlowed laser Newtonian primary mirror alignment on closed tube reflectors. The Howie Glatter TuBLUG is inserted into the focuser in which the laser collimator then attaches to the otherside of the TuBLUG Matte-white 45 degree face and anti-reflection coated Barlow lens mounted in a central axial hole. The Howie Glatter TuBLUG is easily visible from primary adjustment position and can be turned 180 degrees to face the front and has a cut-out.