The Svbony collimating laser is used to align newtonian (mirror) telescopes. The main and secondary mirrors of newtonian telescopes tend to settle due to transport or thermal expansion. When this happens, our telescopes are not able to provide the image quality that they would if properly adjusted. Collimation becomes a routine task after a few times.
Laser collimators have the advantage that they can be used in the dark, and the return laser beam can be seen through a window on the side. This is the case even when the main mirror is positioned at the rear of the telescope. This is particularly useful with longer Newtonian telescopes because, unlike collimating eyepieces, you don't have to look inside the eyepiece to see the effect of the adjustment, which makes it impossible to reach the adjustment screws on the main mirror by hand.
Our laser collimator is made entirely of metal and fits into a 1.25"-inch focuser, but can also be used with a 2"-inch focuser using the included adapter. The brightness can be adjusted in 7 steps, so the laser beam can be adjusted to a very small size.