This is a fairly priced beginner's assorted eyepiece set. I use mine with a dobsonian 300 mm/1500mm telescope. The image quality is decent but not very sharp. I am using the eyepiece set as a reference to determine which is the most ideal size I use the most for planetary and DSV and then purchase a higher quality lense. Set includes several filters as well which I will not comment on because I have not had a chance to use them yet. The 2x Barlow is a great addition to the set.