The new Hubble 5-star Artificial Star ($14.95) is a convenient tool to help you
collimate your telescope optics without taking up precious dark-sky observing time.
The objective cell is user-adjustable, should you ever need to
collimate the optics yourself.
The collimator's 45[degrees] faceplate viewer is laser engraved with a targeting grid that's easily seen from the rear of your Newt, allowing you to
collimate your optics without repeated trips back to the focuser.
To
collimate your scope properly, you have to be able to tilt, rotate, and move the diagonal mirror back and forth along the scope's optical axis.
The process is challenging enough in daylight with a Cheshire collimating tool, but it becomes a chore at night if you're trying to
collimate the optics with a high-power eyepiece while looking at stars.
