Sky-Watcher BKMAK 90 SP telescope Optical tube

The MAK 90 telescope is built using the Maksutov optical system, the characteristics of which are excellent image sharpness and lack of chromatic aberration. It consists of a correction - meniscus plate, a primary mirror and a secondary mirror located on the inner part of the meniscus. A design of this kind works well in metropolitan conditions, where it is difficult to observe any nebular objects in bright skies.