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The ED80 Essential Series Air-Spaced Triplet Refractor is a true apochromatic telescope that reveals celestial wonders like the desolate beauty of the lunar terrain, the serene structure of Saturn's rings or the brightest deep sky treasures of the Messier catalog.Offering true diffraction-limited optics with genuine HOYA FCD1 ED glass, the ED80 is the perfect size to encourage spontaneous stargazing sessions, this high-quality telescope is a perfect grab-and-go instrument for exploring the skies.Featuring an air-spaced triplet optical design that virtually eliminates chromatic aberrations, this telescope generates brilliant high-contrast images by combining genuine HOYA extra-low dispersion (ED) glass and proprietary EMD enhanced multi-layer deposition coatings on all optical surfaces.Although it is a standout telescope on its own, the 80mm also is compact enough to mount on a larger telescope, which can add versatility to your astrophotography experience by separating the guiding and imaging duties. The telescope tube's outside diameter is 91 mm.Explore Scientific 2" rack-and-pinion focuser comes with 2 extension tubes. Explore Scientific Hybrid Finder Scope Base installed on scope. (Finder scope not included.)

The invention of the charge-coupled device 30 years ago was the beginning of a remarkable image capture technology that has changed the course of imaging in fields ranging from astronomy to biotechnology. This book presents a comprehensive history, tutorial, and state-of-the-art description of CCDs and is intended for scientists, engineers, imaging hardware managers, and graduate students.Contents - Preface - History, Operation, Performance, Design, Fabrication and Theory - CCD Transfer Curves and Optimization - Charge Generation - Charge Collection - Charge Transfer - Charge Measurement - Noise Sources - Damage - Appendices - Glossary of CCD Terms - Index

The Intelligent Automatic Tracking Telescope is the smartest way to stargaze! Whether you're an amateur or seasoned astronomer, this incredibly compact and portable wide-field telescope features an automatic computerized design that delivers breathtaking views of the night sky. Take advantage of its 18X-88X magnification capabilities to view the moon's craters, Jupiter's cloud belts, Saturn's rings, and much more! Features an aluminum tripod for maximum portability. Includes 10mm and 20mm eyepieces, a moon filter, and astronomy software.