Celestron Cometron FirstScope 76, 3" tabletop altazimuth reflector

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The remarkably inexpensive and easy-to-use Celestron Cometron FirstScope 76 Dobsonian-style tabletop reflector is perfect for beginning or casual astronomers who want to experience for themselves a dazzling comet, star cluster, or nebula . . . without spending a fortune. 
Our Product #: COM76
Celestron Product #: 21023
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Product Description

The very sensibly priced Celestron Cometron FirstScope 76 reflector is designed for beginning or casual astronomers who want to experience for themselves a dazzling comet, star cluster, or nebula . . . without spending a fortune. This Celestron FirstScope 76 Dobsonian-style tabletop telescope is lightweight and portable, making it a great grab-and-go telescope for spur-of-the-moment observing. It has a simple design that makes it easy for beginners to use, and its no-tool setup means you are up and observing in no time.

The FirstScope 76 has a spherical mirror with a generous 76mm aperture that gathers 118 times as much light as the sharpest eye. This provides bright, sharp views of faint celestial objects and shows the Moon's mountains and craters in crisp detail. And, thanks to its wide field of view, you'll be able to observe comets and even favorite deep-sky objects like the Orion Nebula.

Weighing just 4.3 pounds, the compact Celestron Cometron FirstScope 76 is a tabletop telescope that you can pick up with one hand and take out to observe whenever the urge strikes you. It's also stylish enough to be a decorative fixture on your bookshelf or desk.

This Cometron FirstScope's Optical System . . .

Reflector optical tube: 76mm (3") aperture 300mm focal length f/3.95 spherical mirror Newtonian reflector. The mirrors are aluminized for high light transmission and overcoated with durable silicon dioxide (quartz) for long life.

Rack and pinion focuser: The 1.25" focuser has dual focusing knobs for precise image control with either hand. The large focus knobs are easy to operate, even while wearing gloves or mittens in cold weather.

Two eyepieces: You get two 1.25" Kellner eyepieces: a 20mm (15x) with a 3° field of view (six times the diameter of the full Moon for wide angle views) and a 10mm (30x) with a 1.5° field of view (three times the diameter of the full Moon for more close-up views). Both eyepieces have antireflection coatings on their lens surfaces for sharp images and good contrast.

Finderscope: A low power 5x24mm finderscope attaches to the side of the optical tube. The straight-through viewing refractor finderscope provides a traditional inverted mirror-image astronomical view. If properly collimated (aligned) with the view through the main telescope, its crosshairs will help you center distant objects in the telescope so you don't have to search for them using the narrower eyepiece field of view.

This Cometron FirstScope's Mount . . .

Dobsonian-type tabletop mount: The simple and durable painted fiberboard altazimuth mount has rubber feet that lets it sit securely on a tabletop or any other suitable horizontal surface. The compact and lightweight mount weighs only 4.3 lbs (1.95 kg). It provides smooth right/left and up/down manual motion of the optical tube. This is suitable for low power casual astronomical observing, and will let you easily track objects as they move across the sky.

The large knob that connects the 10" long optical tube to the mount allows you to adjust the friction on the scope in up/down motion. This lets you control how smoothly the mount moves as you manually push the tube to follow objects moving through the sky.

Two year warranty: As an expression of Celestron's confidence in the quality of their products, the Celestron Cometron FirstScope is protected by Celestron's two-year limited warranty against flaws in materials and workmanship.

Tech Details

Aperture 3"
Focal Length 300mm
Focal Ratio f/4
Highest Useful Magnification 75x
Weight 4.3 lbs
Resolution 1.52 arc seconds
Supplied Eyepiece 20mm and 10mm 1.25"
Telescope Type Reflector
View Finder 5 x 24mm
Visual Limiting Magnitude 11.9
Warranty 2 years


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