This laser collimator is an essential accessory for your Newton telescope and is particularly recommended for Newtons with a fast focal ratio (f/4 or f/5). Only a well-collimated telescope can deliver its best performance. The laser collimator (or simply collimation laser) makes the correct alignment of a Newton telescope easy, quick, and precise. You can collimate in no time without additional accessories, even in the dark at your observing site. Precisely manufactured, it fits snugly and without tilting in the focuser. The textured projection surface allows for lateral recognition of the reflection, making it easier to comfortably adjust the primary mirror, even on larger telescopes.