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Celestron > 
Item#: 9SIA04K19M2494

CELESTRON Cometron FirstScope 21023 Telescope

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  • CELESTRON
  • Cometron FirstScope
  • Telescopes

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews


Learn more about the Celestron Cometron FirstScope

Model

|
Brand
CELESTRON
Model
Cometron FirstScope
Part
21023

Details

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Type
Telescopes
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 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
Light Gathering Power (Compared to human eye): 118 x
Secondary Mirror Obstruction: 1.1 in (28 mm)
Secondary Mirror Obstruction by Area: 14 %
Secondary Mirror Obstruction by Diameter: 37 %
Optical Coatings: Aluminum with SiO2
Optical Tube Length: 10 in (254 mm)
Total Telescope Kit Weight: 4.3 lbs. (1.95 kg)
Resolution
(Rayleigh): 1.83 arc seconds
(Dawes): 1.53 arc seconds

Features

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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
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
Extended Warranty Options
Drops & Spills Coverage Plan
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  • Accidental Damage during installation plans available
  • Covers electrical and mechanical failure
  • No deductibles or hidden fees
  • Learn More
Extended Repair Coverage Service Plan
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  • Hassle free repair
  • Covers electrical and mechanical failure
  • No deductibles or hidden fees
  • Learn More
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