Orion 10015 StarBlast 4.5 Astro Reflector Telescope (Teal) A great compact grab-and-go telescope designed for entry-level and intermediate astronomy enthusiasts Substantial 4.5 inch aperture and fast f/4 focal ratio provides bright, detailed views of solar system targets like the Moon and planets, as well as wide-field celestial objects like nebulas and star clusters Ships pre-assembled so you can go from the box to your backyard in minutes. Glass material : Low thermal expansion borosilicate glass Stable tabletop base provides smooth altazimuth motion for easy manual tracking of celestial objects Includes two Explorer II 1.25 inch Kellner telescope eyepieces (17mm and 6mm), EZ Finder II reflex sight for easy aiming, eyepiece rack, collimation cap, Starry Night astronomy software, and more!