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Celestron - AstroMaster 90EQ 90mm Refractor Telescope


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CELESTRON  •  AstroMaster 90EQ 90mm Refractor Telescope:   •  21064   

The Celestron AstroMaster 90EQ Refractor is a step up from the 90AZ, but instead takes advantage of the balance power of a German Equatorial Mount with setting circles to allow for accurate tracking of right ascension and declination to desired celestial coordinates of the night sky. The refractor also has a permanent starpointer on it to assist in accurately pointing the telescope. To assemble, mount the optical tube on the equatorial head with the dovetail connection and snap on the accessory tray. It is that simple! Moons of Jupiter, rings of Saturn and craters of our Moon will all look outstanding and sharp through this refractor. 20mm and 10mm eyepieces are included which result in magnifications of 50x and 100x as well as the SkyX First Light Edition Astronomy Software for basic teaching of the night sky and famous celestial objects.


  • 90mm Refractor
  • Equatorial mount with setting circles
  • Permanent starpointer
  • 20mm and 10mm eyepieces included
  • Aluminum tripod w/ 1.25" Legs
  • Accessory tray
  • SkyX First Light Edition Astronomy Software








Product Series

If you’re looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky. The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. For views of the brighter deep space objects like galaxies and nebulae, we recommend the larger aperture and light gathering ability of the Newtonian reflectors.

Additional Information

Name Celestron - AstroMaster 90EQ 90mm Refractor Telescope
Manufacturer Celestron
Model CEL-21064
UPC 050234210645
Manufacturer Part No CEL-21064
Telescope Aperture 3.1" - 4"
Angular Field of View 1 °
Aperture 90 mm (3.54 in)
Eyepiece 1 20 mm (0.79 in)
Eyepiece 2 10 mm (0.39 in)
Finderscope Built-on StarPointer
Focal Length 1000 mm (39.37 in)
Focal Ratio 11.11
Mount CG-3 Equatorial
Optical Tube Length 36 in (914.4 mm)
Resolution (Dawes) 1.29 arcsec
Resolution (Rayleigh) 1.55 arcsec
Star Diagonal Erect Image Diagonal - 1.25"
Tripod 1.25" steel tube legs