StarDikor 1.25 Inch Laser Collimator With 2" Adapter For Newtonian Telescopes Collimation 7 Brightness Level Astronomical

Newtonian reflectors perform at their best when primary and secondary mirrors are accurately aligned. Such alignment, called collimation, is critical for achieving a sharp, highly resolved view through the telescope. Collimation, while intimidating at first glance, is really not difficult to do. And it’s made all the easier with the Laser Collimator!
This handy tool, designed specifically for collimating the optics of Newtonian reflectors, provides a quick, easy way to a determine if one or both of your telescope’s mirrors need adjustment, and make the necessary adjustment quickly and easily！
Before You Begin Collimating with the Laser Collimator Accurate collimation of your telescope’s optics using the Laser Collimator will most easily be achieved if you do a rough collimation of the optics with your eye first. This is because if the optics are grossly misaligned, it may be confusing to interpret which surfaces the laser is being reflected off of.
This laser collimator uses a low wattage laser to project a red beam down through the telescope’s focuser. The beam reflects off the secondary mirror to the primary mirror, then bounces back up to the secondary mirror and exits through the focuser onto the angled, bulls-eye viewing screen of the collimator itself. The beam is generally not visible, but you’ll see a bright red dot on each reflected surface. The Laser Collimator works equally well to collimate telescope optics in daylight or at night in the dark.