Celestron Cometron FirstScope 76mm Telescope

£49.00✓ 2 year warranty

About this product

Model:  cel_cometron_21023
Part Number:  21023

Essentially an upgraded version of Celestron's hugely popular Firstscope 76, this special edition Cometron 76 features the same Newtonian optics but includes an optical finderscope and higher quality Kellner eyepieces.

Point it at the Moon and you will see craters, for a youngster starting astronomy that alone will provide a ‘WOW’ moment. Jupiter and its four brightest moons are also visible, Saturn's rings too, even under a light-polluted sky! If you are fortunate to live under a dark sky the brighter star clusters, nebulae and even galaxies are within reach. 


  • 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


What's in the box

  • Cometron FirstScope OTA
  • Table Top Dobsonian Base
  • Finderscope
  • 20mm Kellner Eyepiece
  • 10mm Kellner Eyepiece


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:


Cometron FirstScope Manual(PDF)

Customer reviews

Be the first to Write a Review for this item!


Please fill in the form below to ask a question or request a price match.

Your Name:
Your Email Address:
Your Question / Request:
URL of the Cheaper Price:
If you are requesting a price match please let us know the URL where you have seen the product cheaper.

Related Products
Celestron Night Vision Red LED Torch