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Celestron AstroMaster 90EQ Refractor Telescope

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About this product


Product overview

• Explore the sky with this refractor telescope, great for astronomical and terrestrial use
• Capable of up to 213 times magnification to (100 times with supplied eyepieces) see to Saturn’s rings and further
• Comes with two eye pieces (20mm and 10mm) to customise your telescope for the best view
• With a 90mm aperture this telescope will give you a bright and clear image
• Lower the magnification down to 13 times (50 times with supplied eyepieces) for close objects such as birds and wildlife

Special features
• Comes with an Equatorial CG-3 mount and its own tripod for stability
• Two year manufacturer’s warranty for peace of mind (proof of purchase required)

Download the free Celestron Skyportal app on Android or IOS

What can I see with this telescope?
This powerful telescope is great whether you’re trying to see the face of Jupiter or catch a glimpse of elusive wildlife. With its 90mm aperture the telescope can gather up to 165 times the light of the human eye. The AstoMaster 90EQ has a fully coated lens for a clear, crisp image and comes with two eyepieces, one with a 50 times magnitude and another with a 100 times magnitude.

Why choose a refractor telescope?
Refractor telescopes use lenses to collect and focus light to magnify the image. The telescope is sealed at both ends making this type less prone to distortion because of air currents or dust contamination for a steadier, sharper image.

How easy is it to assemble?
The telescope is simple and easy to assemble with no tools required and comes with a stable tripod and counterweight system. The quick release attachment makes it easy to move this telescope around. There is a tray under the telescope to store your alternative eyepiece and other essentials. Two control cables give you control over fine adjustments to positioning easily. The sky pointer can help you position your telescope to the right orientation. The sky pointer is powered by one CR1620 battery (not included).

How easy is it to align my telescope?
The AstroMaster comes on an Equatorial CG-3 mount which can be adjusted to a wide range of positions. By aligning the latitude scale and the setting circles using known points in the sky you can use these to pin point other objects in the night sky. The telescope comes with The Sky X – First Light Edition astronomy software. This includes a 10,000 object database, printable sky maps and 75 enhanced images so you can see exactly what it is you’re looking for. Discover the universe or explore the world around you with this great telescope.


Telescope model number Celestron AstroMaster 90EQ (21064)
Telescope type Refractor
Technical specification
Aperture 90 mm
Focal length 1000 mm
Focal ratio 11
Focal length of eyepiece 1 20 mm
Magnification of eyepiece 1 50 x
Focal length of eyepiece 2 10 mm
Magnification of eyepiece 2 100 x
Optical features
Highest useful magnification 213 x
Lowest useful magnification 13 x
Magnitude 12.3
Light gathering power 165 x
Apparent field of view 1° (with 20 mm eyepiece)
Linear field of view 53 ft @ 1000 yrds (with 20 mm eyepiece)
Optical coating Multi-coated
Alignment procedures Manual latitude scale and setting circles
Power 1 x CR1620 for the Star pointer (not included)
Physical dimensions
Product weight 12.2 kg
Total content weight 15.3 kg
Telescope diameter 90 mm
Telescope length 914 mm
Tripod height 1270 mm
Mount type Equatorial CG3
Screen No
Supplied assembled No
Package contents Celestron Astromaster 90EQ
CG-3 mount
Counterweight bar (with 2 x counterweights)
2 x eyepieces
2 x Slow motion control cables