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