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Orion Telescopes
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Orion EON 115mm ED Triplet Apochromatic Refractor Telescope
$1,699.99
3 easy payments of $566.66
With payment plan
 
Accepted Payment
Expected Ship Date: 01/25/2022

  • A beautifully constructed, 115mm (4.5") aperture triplet ED apochromat ideal for both astrophotography and serious visual observations
  • Fully multi-coated, three-lens ED optics and versatile f/7.0 focal ratio yields high-contrast images with excellent color correction and sharpness
  • New and improved 2.5" dual-speed (10:1) Rack-and-pinion focuser provides precise focus control as well as strong lifting capability for heavy cameras and accessories
  • Includes two split-clamp tube rings and a triple-latch hard case for protection during transport and storage
  • Relatively lightweight 15 lb. optical tube can be stably supported by medium-size equatorial mounts


Learn more
Item #  10285

With exceptional optics, top-notch features and beautiful fit and finish, the Orion EON 115mm ED Triplet refractor telescope offers wide-field observers and astrophotographers an impeccably crafted, true-color instrument at a great price. We've updated the previous award-winning design with an even more robust focuser, and streamlined the tube rings and dovetail bar. From front to back, this is a beautifully well-crafted and rock solid design.

This premium refractor telescope's generous, 115mm (4.5") aperture collects ample light from faint deep-sky objects to provide crisp images with excellent color correction by virtue of the element of FK-61 extra-low dispersion ("ED") optical glass in its air-spaced triplet objective lens. The apochromatic refractor's medium 805mm focal length gives it a fairly fast, f/7.0 f-ratio which performs exceptionally well for wide-field visual use or deep-sky astrophotography. Multilayer anti-reflection coatings on every air-to-glass lens surface maximizes light transmission; while an extendable dew shield, blackened lens edges, and multiple internal knife-edge baffles eliminate off-axis reflections and glare to ensure excellent contrast.

At the back end of the EON 115mm Triplet ED, you'll find a new heavy-duty 2.5" dual-speed Rack-and-pinion focuser with precise 10:1 fine focus control. The focuser features an Orion finder scope base for attachment of any Orion reflex sight or finder scope, if desired. The big focuser's 2.5" drawtube sports an engraved millimeter scale to aid in focus point repeatability, and features a focus-lock thumbscrew, both of which are especially useful for astrophotography. Both the 2" accessory collar on the focuser drawtube and the 1.25" adapter feature non-marring brass compression rings, and a robust "twist-lock" style mechanism for securely clamping down onto the diagonal or camera nosepiece.

Not only is the EON 115mm ED Refractor a great wide-field performer, it's also conveniently compact and measures just 28" with its sliding dew shield retracted for easy transport and storage in the included foam-lined hard carry case. Unlike heavier, bulkier astrophotography telescopes, the relatively lightweight, 15 lb. EON 115mm optical tube needs only a medium-sized equatorial mount to support it.

The EON 115mm refractor's finder dovetail base can also be used for optional guide scopes such as one of our Mini Guide Scopes. A slip-fit metal objective lens cap, a narrow "Vixen-style" dovetail mounting bar and two heavy-duty hinged tube rings with multiple, pre-drilled and tapped holes along the top and bottom are included.

If you're looking for an exquisitely constructed "apo" refractor that can achieve amazing results for both astrophotography and serious visual observing, the versatile Orion EON 115mm ED Triplet is an ideal choice.

Warranty

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
    Lunar & bright deep sky
  • Best for imaging
    Deep sky
  • User level
    Advanced
  • Optical design
    Refractor
  • Optical diameter
    115mm
  • Focal length
    805mm
  • Focal ratio
    f/7.0
  • Coatings
    Fully multi-coated
  • Optics type
    Air-spaced triplet
  • Glass material
    Extra low dispersion
  • Resolving power
    1.00arc*sec
  • Lowest useful magnification
    19x
  • Highest useful magnification
    230x
  • Highest theoretical magnification
    230x
  • Limiting stellar magnitude
    13.0
  • Optical quality
    Diffraction limited
  • Finder scope
    5x24
  • Focuser
    2.5" dual-speed Rack-and-pinion
  • Mount type
    Optical Tube without Mount
  • Astro-imaging capability
    Lunar, planetary & terrestrial
  • Tube material
    Aluminum
  • Length of optical tube
    28.0 in.
  • Weight, optical tube
    15.0 lbs.
  • Additional included accessories
    Aluminum-clad hard case, Tube rings, Aluminum, slip-on objective lens cap
  • Other features
    Retractable dew shield, , Compression ring eyepiece clamp
  • Warranty
    One year

115mm ED Triplet optical tube assembly
Finder scope base (installed)
Narrow style dovetail mounting bar
Heavy-duty hinged tube rings (x2)
Foam-lined hard carry case
Dust caps

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: $45.00
3 Day Delivery: $100.00
2 Day Delivery: $100.00
Next Day Delivery: $200.00

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