Orion Store
Shopping Cart
0 item(s)
HACKER SAFE certified sites prevent over 99.9% of hacker crime.
Mounts & Tripods
Gift Center
Shop by Brand

{"dragByHandle":true,"dragByBody":false,"cssSelector":"ql-thumbnail","widgetClass":"OverlayWidget","bindings":{"bind0":{"element":".ql-thumbnail .Quicklook .trigger","type":"quicklookselected","fn":"function(){$.fnProxy(arguments,\'#headerOverlay\',OverlayWidget.show,\'OverlayWidget.show\');}"}},"effectOnHide":"fade","effectOnShowOptions":"{}","effectOnHideOptions":"{}","closeOnBackgroundClick":true,"effectOnShowSpeed":"1200","onScreenPadding":10,"allowOffScreenOverlay":false,"captureClicks":true,"effectOnShow":"fade","effectOnHideSpeed":"1200"}

Orion Telescopes

{ width: 340, height: 340, defaultImage: '', layers: '08905' }

17.3mm Tele Vue Delos Telescope Eyepiece
Accepted Payment
Expected Ship Date: 10/27/2015

  • This 17.3mm Tele Vue Delos telescope eyepiece provides great views with excellent contrast and color neutrality
  • The Delos eyepiece design achieves full field sharpness and virtually perfect theta distortion mapping
  • Image fidelity is maximized utilizing glass matched multi-coatings and anti-reflection surfaces throughout the telescope eyepiece
  • The adjustable eyeguard's sliding action allows for positioning at the ideal height to suit the observers preference. The eyeguard can also rotate for Tele Vue Dioptrix users
  • 20mm eye relief, 72° FOV, weighs 0.9 lb., limited lifetime warranty

Learn more
Item #  08905
Mfg Model #  EDL-17.3

This 17.3mm Delos telescope eyepiece from Tele Vue will wow you with its performance-packed features such as long 20mm eye relief and a very wide 72° apparent field of view.

The Delos telescope eyepiece design was conceived as a narrower field alternative to Tele Vue Ethos telescope eyepieces. Reducing the field of view to 72° allowed freedom to increase eye relief, while controlling pupil aberrations, all without making the eyepiece too large. With Ethos performance standards as benchmarks, the Delos eyepiece design achieves full field sharpness, virtually perfect theta distortion mapping, and color neutrality. Image fidelity is maximized utilizing glass matched multi-coatings and anti-reflection surfaces throughout the eyepiece. Contrast is further enhanced with a new continuously adjustable height eyeguard system that can be locked in any position. Since the Delos eye-lens measures a quite large 35mm in diameter, preventing stray light from the reflecting off the first surface and extraneous light from entering your eye pays off in a nice increase in perceived contrast. The Delos eyeguard’s sliding action allows for positioning the soft rubber eyeguard at the ideal height to suit the observers preference. Indicator marks on the telescope eyepiece body are handy reference guides for setting your perfect position. The eye-guard can also rotate for Tele Vue Dioptrix users.


This product is serviced and supported by its manufacturer according to the terms and conditions included in the packaged product. Orion's limited warranty does not apply. Please contact the manufacturer directly for technical support.

  • Design
  • Eyepiece focal length
  • Barrel size
  • Apparent field of view
  • Eye relief
  • Coatings
    Fully multi-coated
  • Filter threads
  • Parfocal
  • Field stop diameter
  • Barrel security recess
  • Blackened lens edges
  • Rubber eyeguards
  • Body material
  • Case
  • Weight (oz.)
  • Warranty
    Limited lifetime

Orders received by 1pm Eastern Time for in-stock items ship the same business day. Orders received after 1pm 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.


This product is available to ship Standard delivery within the 50 US states, APO/DPO/FPO addresses and US territories/protectorates. Delivery is not available to Canada.

{"dragByHandle":true,"dragByBody":false,"cssSelector":"ql-category","widgetClass":"OverlayWidget","bindings":{"bind0":{"element":".Quicklook > .trigger","type":"quicklookselected","fn":"function(){$.fnProxy(arguments,\'#_widget1418407271089\',OverlayWidget.show,\'OverlayWidget.show\');}"},"bind1":{"element":".PagedDataSetFilmstripLoader > .trigger","type":"itemsloaded","fn":"function(event, startIndex, itemCount, newItems) { QuickLookWidget.assignEvents(newItems); $(\".Quicklook > .trigger\", newItems).bind(\"quicklookselected\", function(event, source, x, y) { OverlayWidget.show(\'#_widget1418407271089\', event, source, x, y); }); }"}},"effectOnHide":"fade","effectOnShowOptions":"{}","effectOnHideOptions":"{}","closeOnBackgroundClick":true,"effectOnShowSpeed":"","onScreenPadding":10,"allowOffScreenOverlay":false,"captureClicks":true,"effectOnShow":"fade","effectOnHideSpeed":"1200"}