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Orion - 110mm EON ED Apochromatic Refractor Telescope


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Availability: Available - Ships in 2-4 Days


Available - Ships in 2-4 Days

Manufactured by: Orion


  • Beautifully crafted refractor with a 110mm (4.3") air-spaced doublet lens made with FPL-51 ED glass
  • Fairly fast, f/6.0 refractor with outstanding color correction for great wide-field astrophotographic or visual use
  • Three optimally positioned knife-edge baffles inside the optical tube eliminate off-axis reflections and glare to ensure excellent contrast
  • Precise 2.7" dual-speed (11:1) hybrid-drive focuser supports hefty imaging gear trains weighing up to 17 lbs. without slippage
  • Weighs 11.5 lbs. with included tube-rings attached

One look at the Orion EON 110mm f/6.0 ED Apochromatic Refractor and its slick gloss-black machined optical tube and you'll know this is an exquisite telescope. One more look - this time through the f/6.0 apochromatic optics - and you quickly realize this refractor's beauty is much more than skin-deep. It's a gorgeous telescope inside and out!

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 FLP-51 element of extra-low dispersion ("ED") optical glass in its air-spaced doublet objective lens. The apochromatic refractor's 660mm focal length gives the EON 110mm ED a fairly fast, f/6.0 f-ratio which performs exceptionally well for wide-field visual use or deep-sky astrophotography. Not only is the EON 110mm ED Refractor a great wide-field performer, it's also delightfully compact and measures just 21.5" 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. 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 EON 110mm features a robust, 2.7" hybrid-drive rack-and-pinion focuser which 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 of the EON 110mm ED Refractor 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. Both the 2" focuser collar and included 1.25" adapter feature non-marring brass compression rings. If you wish to attach an aiming device to the EON 110mm refractor, two pre-threaded holes on the telescope's focuser accommodate an optional Orion Dovetail Finder Scope Base and compatible Orion Finder Scope. An optional Orion Field Flattener for Short Refractors (sold separately) is available for enhanced astrophotography use.

The Orion EON 110mm f/6.0 ED Apochromatic Refractor Telescope comes with two very substantial hinged tube rings which each feature multiple, pre-drilled and tapped M6 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"x9.5".

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!










Additional Information

Name Orion - 110mm EON ED Apochromatic Refractor Telescope
Manufacturer Orion
Model ORI-10031
Manufacturer Part No ORI-10031
Telescope Aperture 4.1" - 5"
Focal Length 660mm
Focal Ratio f/6.0
Focuser 3" dual-speed linear bearing Crayford
Highest Useful Magnification 217x
Included Accessories Aluminum-clad hard case, Tube rings, Starry Night CD-ROM
Length 21.5 in.
Limiting Stellar Magnitude 13.8
Lowest Useful Magnification 16x
Material Aluminum
Mount Optical Tube without Mount
Objective 110mm
Optical Coatings Fully multi-coated
Optical Design Refractor, Air-spaced doublet
Resolving Power 1.05arc*sec
Warranty One year