A laser collimator sits in the focuser and projects a beam onto the primary mirror and back, giving a fast way to align a Newtonian or Dobsonian. Choices here include the Farpoint 650nm lasers and collimation kits, the Baader Laser-Colli MkIII, the SVBONY F9123A and SV121, the Antares laser with side view and the Starfield Deluxe Laser Collimator. Part of Telescope Collimation Tools.