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The Celestron Cometron FirstScope 76 Telescope is a compact, lightweight telescope that's perfect for beginners looking to experience the magic of a dazzling comet, planet, or nebula. This tabletop Dobsonian style telescope includes a spherical mirror with a generous 76mm of aperture. It provides bright, sharp views of comets and other celestial objects, and renders the Moon's mountains and craters in crisp detail. Thanks to its wide field of view, you'll be able to observe the brightest part of the comet and its tail or favorite deep sky objects like the Orion Nebula. The Cometron FirstScope offers several upgrades from the original Celestron FirstScope, including 2 Kellner eyepieces and a 5x24 finderscope. Weighing in at just 4.3 pounds, the Cometron FirstScope is a tabletop telescope that you can take on all your outdoor adventures. Features Fast focal ratio offers a wide field of view, perfect for observing comets, star clusters, galaxies, and more Lightweight and portable, a great grab and go telescope Simple design makes it easy for beginners to use No tool setup means you are up and observing in no time Includes a finderscope and 2 Kellner eyepieces Specifications Optical Design Newtonian Reflector Aperture mm 76 mm 2.99 in Telescope Type Manual Focal Length 300 mm 12 in Focal Ratio 3.95 Focal Length of Eyepiece 2 mm Kellner 10 mm 0 in Finderscope 5x24 Tripod None Highest Useful Magnification 180 x Lowest Useful Magnification 11 x Limiting Stellar Magnitude 11.9 Resolution Rayleigh 1.83 arc seconds Resolution Dawes 1.53 arc seconds Light Gathering Power Compared to human eye 118 x Secondary Mirror Obstruction 1.1 in 28 mm Secondary Mirror Obstruction by Diameter 37% Secondary Mirror Obstruction by Area 14% Optical Coatings Aluminum with SiO2 Optical Tube Length 10 in 254 mm Total Telescope Kit Weight 4.3 lbs 1.95 kg Warranty 2 year Telescope Warranty
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