Farpoint Primary Mirror Center Marking Kit — Up to 12.5"The Farpoint Primary Mirror Center Marking Kit gives you everything you need to accurately mark the center of your Newtonian or Dobsonian primary mirror the essential first step before collimation can begin. Why Center Marking Matters Accurate collimation depends on knowing exactly where the center of your primary mirror is. Without a proper center mark, your laser collimator and Cheshire eyepiece have no reference point you're guessing instead of