Description
Reflector or Newtonian type telescopes use a primary and secondary mirror to direct light to the telescope eyepiece and magnify the subject. As the correct alignment of these two mirrors is imperative for high performance regular maintenance is recommended. All reflectors regardless of their origin are susceptible to knock and bumps over time that can cause these mirrors to move out of alignment. The Skywatcher OPCOLL fits in your telescopes focuser to aid in re-collimation. See the manual that came with your Skywatcher telescope or the more details link below.