Collimating a Newtonian Reflector Telescope - Tutorial

Learn about collimation of Newtonian Reflector Telescopes. What is collimation? Why should you do it? How do you do it? After watching this video you should feel confident to collimate your own Newtonian Reflector telescope.
IMPORTANT NOTE: I do not mention in the video the rotation of the secondary mirror. It is important to align the secondary mirror in rotation (by loosening the central bolt and rotating the whole mirror assembly, then re-tightening), positioning it so that light reflected from the primary is directed into the focus tube. If this is not done well enough, you will not be able to achieve collimation using the three secondary mirror tilt adjustment screws, as they have a limit adjustment range.

Laser Collimator:

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