[Used] Celestron EDGE HD 8" Optical Tube, CGE rail

203mm Aplanatic Edge HD Schmidt-Cassegrain Telescope (optical tube only). The Edge HD 800 utilizes aplanatic Edge HD Schmidt-Cassegrain optics corrected to the diffraction limit. The Edge HD optical system combines the highly popular compactness of Schmidt-Cassegrain telescopes with newly designed high-definition optics that allow for wide-field imaging with the quality typical of astrographs. When used for visual observation, Edge HD optics provide pinpoint stellar images right to the edge, even with 2-inch ultra-wide-angle eyepieces. When used for astroimaging, Edge HD optics produce aberration-free images across the entire field covered by CCD or DSLR cameras, even with Full Frame formats. All Edge HD optics have been designed to produce a very flat focal plane, generating perfectly focused stellar images to the extreme edge of the sensor. The C8 Edge HD is suitable for both visual and photographic use and has been designed to be modular, capable of performing optimally within focal length ranges from 400mm to 8000mm (with optional accessories, including those from third-party manufacturers). The XLT optical coating enhances light transmission, also offering very high contrast on both planets and deep-sky objects. Edge HD telescopes are also Fastar-compatible and are equipped with a primary mirror clutch system and micro-filtered side vents to speed up the thermal equilibrium process of the optics. The package includes several quality accessories: a 9x50mm finder scope, a 40mm Plössl eyepiece, a 31.8mm diameter diagonal, and a dovetail bar for CGE/Losmandy/NEQ6 mounts.

Key features

Celestron quality for a reliable and satisfying observation experience.

• Diameter (mm): 203
• Focal ratio: f/10

Main technical specifications