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Product Discontinued by Manufacturer
Celestron Cosmos FirstScope Telescope has been discontinued by Celestron and is no longer available. Our product experts have helped us select these available replacements below.
Product Info for Celestron Cosmos FirstScope Telescope
Observe and discover the wonders of deep space with the Celestron Cosmos FirstScope Telescope. This telescope engineered by the experts at Celestron features a spherical mirror with a generous 76 mm of aperture. You'll get bright, sharp views of celestial objects, and observe the Moon's mountains and craters in crisp detail. With its wide field of view, the Cosmos FirstScope Special Edition Portable Telescope lets you observe expansive views of the sky which include open star clusters, comets, or deep-sky objects such as the Orion Nebula. The Celestron Cosmos FirstScope Newtonian Reflector Telescope also makes for a perfect companion on camping trips, and all your outdoor adventures.
Specifications for Celestron Cosmos FirstScope Newtonian Reflector Telescope:
| 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: | StarPointer |
| 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 |
Features of Celestron Cosmos FirstScope Portable Telescope:
- Special edition COSMOS eye nebula wrap on optical tube
- 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 StarPointer finderscope, 2 Kellner eyepieces, free planetarium app, and Cosmic Calendar poster
Package Contents:
- Cosmos FirstScope Special Edition Portable Telescope