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Orion Telescopes
Orion EON 110mm ED f/6.0 Apochromatic Refractor Telescope
3 easy payments of $433.33
With payment plan
Accepted Payment
Expected Ship Date: 08/23/2024

  • Beautifully crafted refractor with a 110mm (4.3") air-spaced doublet lens made with FPL-51 ED glass
  • Fast, f/6 refractor with outstanding color correction for great wide-field astrophotographic or visual performance
  • Precise 2.7" dual-speed (11:1) hybrid-drive focuser supports hefty imaging gear trains weighing up to 17 lbs. without slippage
  • Newly upgraded with twist-tight 2" and 1.25" collars and installed dovetail finder scope base
  • Includes tube rings, retractable dew shield, and aluminum-clad hard case

Learn more
Item #  10031

It's back by popular demand! We're reintroducing the Orion EON 110mm f/6.0 ED Apochromatic Refractor, but newly upgraded to make it an even better value!

This black beauty occupies a desirable "sweet-spot" for telescopes, especially if you're interested in deep-sky imaging or wide-field observing. The EON's generous, 110mm (4.3") aperture gobbles up photons from faint deep-sky objects and offers ultra-crisp images and great color correction by virtue of the FPL-51 element of extra-low dispersion ("ED") optical glass in its air-spaced doublet objective lens. The refractor's 660mm focal length gives the EON 110mm ED a fast, f/6.0 f-ratio which performs exceptionally well for wide-field visual use or deep-sky astrophotography.

And now the EON 110 ED has been upgraded with a twist-tight 2" focuser collar and a 1.25" twist-tight adapter for quick and ultra-secure attachment of accessories to the focuser. A simple clockwise twist of the knurled aluminum collar precisely centers any inserted eyepiece or accessory and holds it firmly in place. There are no little thumbscrews to fumble with! Both collars feature non-marring brass compression rings. Also, now the EON 110 ED comes with a dovetail finder scope base installed ? ready for the addition of any Orion finder scope or reflex sight (sold separately)!

Not only is the EON 110mm ED Refractor a great wide-field performer, it's also delightfully compact and measures just under 22" with its sliding dew shield retracted for easy transport. Unlike heavier, bulkier astrophotography telescopes, the EON 110mm ED needs only a medium-sized mount to support It, such as the Orion Sirius EQ-G. The EON 110mm ED boasts all these performance-packed features, yet is priced to please at thousands less than multi-element apochromatic refractors of comparable aperture. Sweet spot indeed!

Take a closer look and you'll find even more to like about the EON 110mm ED. The refractor's optics are fully multi-coated for maximum light throughput so you'll get the most out of each and every photon collected by the telescope. Three optimally placed knife-edge baffles inside the optical tube ensure rich contrast by eliminating off-axis reflections and glare that can be detrimental to both visual and astrophotographic pursuits. The 2.7" hybrid-drive rack-and-pinion focuser outperforms most Crayfords we've used. The focuser's integral 8-ball-bearing system, helical gear drive, and dual-speed (11:1) motion control gives both silky smoothness and unflinching rigidity. The focuser features a patented focus lock mechanism that locks the drawtube in two directions, providing a much more rigid lock than most focusers. In fact the focuser is solid enough to easily support astrophotography equipment trains weighing up to a whopping 17 lbs. ? without slipping!

The EON 110mm ED's focuser can be rotated in two places, allowing camera framing to be set independently from your preferred positioning of the apochromatic refractor telescope's focus knobs. The rugged focuser's drawtube sports an engraved millimeter scale to aid in focus point repeatability - a great time-saver during astrophotography sessions. For wide-field visual use during the day or night, 1.25" and 2" diagonals and eyepieces can be used with the EON 110mm ED refractor. An optional Orion Field Flattener for Short Refractors (sold separately) is available and recommended for astrophotographic use.

The Orion EON 110mm f/6.0 ED Apochromatic Refractor Telescope comes with two hinged tube rings equipped with pre-drilled and tapped 1/4"-20 holes along the top and bottom for convenient dovetail mounting plate attachment. An aluminum-clad hard carry case with a die-cut foam interior is included to keep the EON 110mm ED safe and clean during transport and storage. The hard case measures 28.25"x9.25"x9.75".

With flat-out gorgeous workmanship, exceptional optical performance, smooth-adjusting yet rigid focuser and more, the Orion EON 110mm ED will delight any astrophotographer, apochromat aficionado, or wide-field stargazer seeking that "sweet spot" telescope - a high-end, fast refractor at a refreshingly affordable price. Get yours today!


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.

Product Support
Visit our product support section for instruction manuals and more
  • Best for viewing
    Brighter deep sky
  • Best for imaging
    Deep sky
  • User level
  • Optical design
  • Front-end outside tube diameter
    5.31 in.
  • Optical diameter
  • Focal length
  • Focal ratio
  • Coatings
    Fully multi-coated
  • Optics type
    Air-spaced doublet
  • Glass material
    Extra low dispersion
  • 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
    21.5 in.
  • Weight, optical tube
    11.5 lbs.
  • Additional included accessories
    Predrilled holes for optional Orion finder scope, Retractable dew shield, Internal knife-edge baffles
  • Other features
    Aluminum-clad hard case, Tube rings
  • Warranty
    One year

Orion EON 110mm f/6.0 optical tube assembly
Aluminum Objective Cap
1.25" twist-tight adapter
Tube Rings (pair)
Hard Carrying Case
2.5mm hex key

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: $15.00
3 Day Delivery: $49.00
2 Day Delivery: $49.00
Next Day Delivery: $61.00

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