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How does it work? Each screw, when being tightened, pushes the secondary mirror, giving it a different angle and so bouncing the laser in a different direction.

Collimating a telescope is pretty easy, especially if using a laser, but first-timers might get confused by this simple process and end up breaking one of their mirrors (yes, we did).

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We decided to make this tutorial, as well as a video (which you can find at the end of this post). As for most of our tutorials, this will be quick and straight to the point!

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Make sure you do not tighten the screws too much or you will break the secondary mirror holder. It happened to us once and we had to completely replace the holder.

Go to the back of the telescope. You do not need any tools for this, so put the screwdriver in a safe place and simply use your fingers.

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If you just bought a laser collimator, please make sure it is collimated! You can do that by placing it on a table not too far from a bright wall, and turning it on. Then, slowly roll the laser and see if there is any suspicious movement in the red dot on your wall. It should not go up or down, but just sideways. You can also attach it to your telescope and rotate it while it is on while watching the dot on the mirror. The dot should not move at all.

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Start in the front of the telescope. This is where the secondary mirror is located. What you want to do is tighten or loosen the three tiny screws that are just in the middle of the spider veins.

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Attach the laser collimator to the telescope, just where the eyepiece or camera would go. Make sure the target drawn on the device is facing toward the back of the telescope.

Those knobs work exactly like the screws behind the secondary mirror. Your goal here is to turn each knob until the laser is bounced back to the center of the bullseye, visible on the laser collimator. This is why it is important to attach it facing toward the back of your scope!