Highly affordable and easy to use Dobsonian base, perfect for beginners Great all-around astronomical viewing performance Aluminized and overcoated mirrors and Carefully engineered to combine ease of use, extreme portability and consistent performance in an affordable package Enough light gathering power to allow a simple study of galaxies, star clusters, and nebulae. Diameter: 76mm, Focal Length: 300mm 2 interchangeable eyepieces Available in 3 colors. (Custom design available for quantity orders. Contact your local Sky-Watcher distributor for information.) Color available in Midnight Blue and Black Diamond