This is a hands-on book for the amateur who has always wanted to make a refractor. The author adopts the role of coach and guides the reader, step by step, through all aspects of making a doublet lens; from the characteristics of glass, abrasives, and pitch to methods for mounting the finished lens. The author’s spreadsheet programs, included on CD-ROM, provide a direct approach to designing a well corrected lens. For those not interested in lens design, prescriptions are provided (more…)

From the Manufacturer The Galileo 800MM x 80MM Astronomical Reflector Telescope showcases an 80mm primary mirror and an 800mm focal length. Also includes an electronic Mars Eye Finderscope, a large 1.25-inch helical rack and pinion focuser. The pre-assembled metal tripod has an Altitude Azimuth Yoke mount and retractable rubber feet. It’s easy use up and down, left and right movement is great for beginners and casual star gazers alike. The Altitude Azimuth Yoke Mount features a slow (more…)