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Orion Telescopes
Orion EON 104mm ED-X2 f/6.25 Triplet Apo Refractor Telescope
3 easy payments of $933.33
With payment plan
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In Stock
  • With not one, but TWO ED glass elements, this apochromatic refractor provides exceptional visual and astrophotographic performance
  • Large 104mm aperture and 650mm focal length ideal for wide-field imaging and observation
  • Triplet objective features one element of FPL-53 ED glass and one element of FPL-51 ED glass for true-color views and images
  • Hybrid-drive, rotatable 2.7" focuser with 11:1 dual-speed control can support up to 17.6 lbs. of imaging gear without slippage
  • Includes hard carry case with custom die-cut foam insert, sturdy machined tube rings and dovetail bar, 1.25" adapter, and more

Learn more
Item #  10090

With two ED glass elements for remarkable true-color performance, the Orion EON 104mm f/6.25 ED-X2 Triplet is certain to satisfy your "apo" appetite. Even the most demanding astrophotographers and observers will be thoroughly impressed by this gorgeous telescope.

Most ED triplets feature just one ED glass element, but the beautifully crafted EON 104mm ED-X2 apochromatic refractor stands above ordinary triplets by having one element of FPL-53 ED glass and one element of FPL-51 ED glass in its objective lens assembly. With gloss-black machined construction, and attractive satin-red features and accessories, the Orion EON 104mm ED-X2 telescope is a truly gorgeous astronomy instrument to look at and look through!

Lens - EON 104mm ED-X2

Two elements of extra-low dispersion ED glass ensures exceptional performance with this triplet Apo.

With two fluoro-crown ED glass elements and fully multi-coated optics, the Orion EON 104mm ED-X2 refractor provides superior correction of chromatic and spherical aberrations. By suppressing these aberrations so effectively, this triplet "apo" telescope produces impeccable visual views and razor-sharp astrophotos without any fringing or loss of clarity.

DS Focuser - EON 104mm ED-X2

Dial-in fine details with the precision dual-speed hybrid-drive focuser.

The EON 104mm ED-X2 sports a big, 2.7" hybrid-drive rack & pinion focuser features dual-speed (11:1) controls to easily fine-tune focus, and can support imaging gear trains weighing up to 17.6 lbs. You can rotate the focuser 360 to optimize imaging or observing convenience. The focuser has a built-in focus lock knob, and a step-down 1.25" adapter makes the EON 104mm ED-X2 compatible with either 2" or 1.25" size accessories.

AP Setup - EON 104mm ED-X2

Whether used for imaging, observing, or both, the EON 104mm ED-X2 is sure to impress.

The 104mm EON ED-X2 refractor measures 650mm in focal length with a fast f/6.25 focal ratio for great wide-field performance. Multiple internal baffles prevent off-axis reflections for excellent contrast, while a retractable lens shade helps eliminate glare and dew buildup. Weighing in at 14.6 lbs. with all included accessories installed, the lightweight EON 104mm ED-X2 matches well with many medium-size mounts for astrophotographic or observational performance.

Case - EON 104mm ED-X2

Everything fits nicely in the included hard case for safe storage and transport.

A thread-on objective lens cover, two heavy-duty machined tube rings, a sturdy machined dovetail bar for easy mount attachment, and a dovetail finder scope base (installation required) are included with the Orion EON 104mm ED-X2 f/6.25 Triplet Apo Refractor. An included hard carry case with a custom die-cut foam insert ensures safe transport and convenient storage.

Media Buzz

Astronomy Now magazine, January 2017
"In this newly designed Orion EON triplet, two of the three components are ED -- being FPL-53 and FPL-51 -- squeezing in every last ounce of correction for spherical aberration and false color. The result is a relatively fast (for a conventional refractor!) f/6.25 four-inch (104mm) aperture 'scope that provides exceptional acuity both visually and photographically."


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 800-477-1001.


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
    Deep sky
  • User level
  • Optical design
  • Optical diameter
  • Focal length
  • Focal ratio
  • Coatings
    Fully multi-coated
  • Optics type
    Air-spaced triplet
  • Glass material
    Extra low dispersion FPL-53
  • Resolving power
  • Lowest useful magnification
  • Highest useful magnification
  • Highest theoretical magnification
  • Limiting stellar magnitude
  • Optical quality
    Diffraction limited
  • Finder scope
  • Focuser
    2.7" Hybrid dual-speed Rack-and-pinion
  • Mount type
    Optical Tube without Mount
  • Astro-imaging capability
    Lunar, planetary & long exposure
  • Tube material
  • Length of optical tube
    22.5 in.
  • Weight, optical tube
    14.6 lbs.
  • Additional included accessories
    Aluminum-clad hard carry case, 7" Dovetail mounting bar, Heavy duty tube rings
  • Other features
    One element of FPL-51 and one element of FPL-53, 2.7" Hybrid-drive R&P focuser, rotatable, Retractable dew shield; dovetail finder scope base
  • Warranty
    One year

Orion EON 104mm ED-X2 f/6.25 Triplet Apo Refractor Telescope
Pair of hinged tube rings
Narrow "Vixen-style" dovetail mounting bar
Hard carrying case with die-cut foam interior
Starry Night SE astronomy software digital download voucher 

Orders received by 1pm Eastern Standard Time for in-stock item 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: $15.00
3 Day Delivery: $43.00
2 Day Delivery: $43.00
Next Day Delivery: $56.00

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