This article is a review of the Optolong LRGB filters . In the beginning, I bought some basic filters to see if my filter wheel would work and how it would work, but later I upgraded to these Optolong filters to improve the photos I was taking.
This article examines a spectacular type of object created by a star's final act, a planetary nebula, or more specifically, the Blue Snowball Nebula. Other names that are commonly used for this nebula include NGC 7662, Caldwell 22, and Snowball Nebula.
In this article I am going to discuss the collimation of SCT's this is a worry for a lot of people, but in fact it is quite simple and even more important that an aligned finderscope or clean eyepieces .