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Orion 80ED Refractor Telescope Comments Orion Short Tube Telescope is a very good first telescope choice. I bought this telescope after I read a very good review in Sky & Telescope magazine, and I wasn't disappointed. Specifications Optical design: refractor Clear aperture: 80mm (3.5") Objective lens: Achromatic (rear element ED glass) Focal length: 600mm (23.62") Focal ratio (photographic speed): f/7.5 Focuser: Crayford, accepts 1.25" or 2" accessories Resolving power: 1.45 arc secs Maximum practical visual power: 160x Light Grasp: 131x Limiting Magnitude: 12 Telescope mounting: photo tripod screw 1/4" Finder scope: not supplied Diagonal prism: not supplied Eye-pieces: not supplied Tube body: seamless aluminum Telescope dimensions: D=100mm x 390mm Telescope aprox weight: 2.6kg (5lbs 11oz) +Pluses+:
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