Sometimes your car needs an alignment. So does your Newtonian telescope! Collimation helps the optical rays entering the scope stay parallel and focused, ensuring minimal distortion and optical aberrations as the light propagates. Farpoint has a variety of collimation tools including our custom laser collimators, which have a lifetime guarantee to never go out of alignment. Farpoint Collimation tools are designed only for Newtonian and Dobsonian Reflecting Telescopes. They are not designed for Refractors, Catadioptric Telescopes, or SCT's.