To get the best out of a reflecting telescope (one that uses mirrors), it is sometimes necessary to align the mirrors to reflect light optimally.
To get the best out of a reflecting telescope (one that uses mirrors), it is sometimes necessary to align the mirrors to reflect light optimally. The process of adjusting the mirrors so that they are in alignment is called “collimation”, which is made far easier when using a laser collimator. This device shines a laser beam down through the telescope, helping adjustments to be made and, with a little practice (or help from your local club or society), is straightforward. The Baader Laser Collimator is by far the best and is the only one you will ever need to buy!