Celestron Heliostar 76 H-Alpha 630mm Focal Length Solar Telescope and SolarQuest Mount KitDiscover the sun's secrets like never before with the Celestron Heliostar 76 H Alpha Solar Telescope and SolarQuest Mount Kit. This comprehensive package is designed for amateur astronomers and solar enthusiasts who demand quality, performance, and convenience in one. High Contrast Performance The Heliostar OTA features a 76mm aperture and a 630mm focal length, achieving an f8. 3 focal ratio. It provides double stack performance at a single stack