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Orion Telescopes
Orion BX90 EQ 90mm Equatorial Refractor Telescope
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  • This complete, mid-size refractor telescope is packed with features for serious beginners
  • Versatile 90mm aperture, f/6.7 telescope delivers bright views of a wide variety of celestial objects from the Moon and planets to star clusters and more beyond the Solar System
  • Designed for stargazing, the included EQ-1C equatorial mount provides slow-motion controls to easily track objects as they appear to move across the night sky
  • Use the included 25mm eyepiece for wide 24x views, and boost power up to 60x with the 10mm eyepiece
  • Also includes 90-degree diagonal and a red-dot reflex sight

Learn more
Item #  52588

With its moderate f/6.7 focal length and 90mm aperture, this mid-size refractor telescope is a great choice for serious beginners.

The wide-field optics of the BX90 EQ Refractor makes it easier to find objects in the night sky compared to longer telescopes. The refractor's substantial 90mm (3.54") objective lens collects much more light than typical starter scopes for brighter, more pleasing performance on a wide variety of interesting celestial objects. Whether you're going after powerful views of craters on the Moon, or looking for wide views of star clusters beyond the Solar System, the versatile Orion BX90 EQ Refractor fits the bill. Internal, knife-edge baffles help minimize off-axis reflections to optimizes contrast for sharp and crisp observations.    

The included EQ-1C equatorial mount comes with useful slow-motion controls which can be used to manually track objects as they appear to move across the sky. You can even add an optional EQ-1CM motor drive (sold separately) for hands-free tracking. The EQ-1C mount sits on top of a sturdy tripod with a clip-in accessory tray that enhances stability and provides a spot to stow idle eyepieces and accessories. The tripod features extendable legs which can be adjusted in height for comfortable use. Once assembled, the entire BX90 EQ weighs 15.5 lbs. for easy portability.

This complete telescope setup comes with everything you need to star stargazing right away. Two 1.25" eyepieces provide different magnification options right out of the box. Use the included 25mm Kellner for wide views at 24x magnification, and boost magnifying power up to 60x with the 10mm Plössl eyepiece when you want to take a closer look. The Orion BX90 EQ Refractor Telescope also includes a 90° star diagonal for comfortable nighttime viewing and a red-dot sight to help aim the telescope.


Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-447-1001.


Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

Product Support
Visit our product support section for instruction manuals and more
  • Best for viewing
    Lunar & planetary
  • Best for imaging
    Solar, lunar & planetary
  • User level
  • Optical design
  • Optical diameter
  • Focal length
  • Focal ratio
  • Coatings
  • Optics type
    Air-spaced doublet
  • Glass material
  • Eyepieces
    Kellner 25.0mm,Plossl 10.0mm (1.25")
  • Magnification with included eyepieces
    24x, 60x
  • Resolving power
  • Lowest useful magnification
  • Highest useful magnification
  • Highest theoretical magnification
  • Limiting stellar magnitude
  • Finder scope
    Reflex sight
  • Focuser
    1.25" Rack-and-pinion
  • Diagonal degrees
    1.25" 90° Mirror Star
  • Mount type
  • Astro-imaging capability
    Lunar & planetary
  • Dovetail bar system
  • Motor drive compatibility
    Clock drive sold separately
  • Setting circles
  • Polar-axis scope
    Not available
  • Tube material
  • Tripod material
  • Length of optical tube
    23.7 in.
  • Weight, optical tube
    3.3 lbs.
  • Weight, mount/tripod
    8.9 lbs.
  • Weight, fully assembled
    15.5 lbs.
  • Additional included accessories
    Clip in accessory tray
  • Other features
    Includes one 3.25 lb counterweight
  • Warranty
    One year
  • Lithium Battery Weight
    0.10 grams

Orion BX90 90mm f/6.7 Refractor Telescope Optical tube
EQ-1C equatorial mount and adjustable tripod
One 3.25 lb. counterweight
Tube mounting clamp
25mm Kellner eyepiece, 1.25"
10mm Plossl eyepiece, 1.25"
90-degree Star diagonal, 1.25"
Red-dot reflex sight

Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

A per-item shipping charge (in addition to the standard shipping and handling charge) applies to this product due to its size and weight. This charge varies based on the shipping method.

Standard Delivery: $0.00
Standard Delivery to Canada: $20.00
3 Day Delivery: $51.00
2 Day Delivery: $51.00
Next Day Delivery: $58.00

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