About this product
Model: cel_cometron_21023
Part Number: 21023-CGL
This compact tabletop Dobsonian is an excellent first telescope for a youngster starting astronomy.
The Celestron Cometron is an upgraded version of Celestron's hugely popular Firstscope 76.
This special edition model features the same Newtonian optics but is supplied with an optical finderscope and higher quality Kellner eyepieces.
Point it at the Moon, and you will see craters. That alone will provide a ‘WOW’ moment for someone starting astronomy.
Jupiter and its four brightest moons are also visible, as are Saturn's rings. Even under a light-polluted sky! If you are fortunate enough to live under a dark sky, the brighter star clusters, nebulae, and even galaxies are also within reach.
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 two Kellner eyepieces
Videos
What's in the box
- Cometron FirstScope OTA
- Table Top Dobsonian Base
- Finderscope
- 20mm Kellner Eyepiece
- 10mm Kellner Eyepiece
Specifications
Optical Design | Newtonian Reflector |
Aperture (mm) | 76 mm (2.99 in) |
Focal Length | 300 mm (12 in) |
Focal Ratio | 3.95 |
Focal Length of Eyepiece 1 (mm) | Kellner 20 mm |
Magnification of Eyepiece 1 | 15 x |
Focal Length of Eyepiece 2 (mm) | Kellner 10 mm |
Magnification of Eyepiece 2 | 30 x |
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 | 1.95 kg (4.3 lbs) |
Warranty | 2-year Telescope Warranty |
Downloads / Manuals
The following manuals and downloads are available for this product:
Manuals
Cometron FirstScope Manual(PDF)
Customer reviews
FAQ
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