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Tele Vue Delos 17.3mm Eyepiece - 1.25"

Item # TE-EDL-17.3

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Quick Overview

  • This Tele Vue Delos Eyepiece has a 17.3mm focal length and is presented in a 1.25" format.
  • Continuously adjustable height eyeguard system that can be locked in any position.
  • This Tele Vue 17.3mm Delos Eyepiece achieves full field sharpness, virtually perfect f θ (theta) distortion mapping, and color neutrality.
  • Delivers 20mm eye-relief and a realistic 72 apparent field of view.

Tele Vue Delos 17.3mm Eyepiece - 1.25"

Tele Vue Delos Eyepieces

"It was natural to take lessons learned from the tremendously successful Ethos project and apply it going forward. In the fall of 2008, Paul Dellechiaie was tasked to investigate a long eye-relief eyepiece design in the 70° AFOV range, retaining the key performance goals met with Ethos. My father named Paul's design, "Delos." Delos is a beautiful Greek island which happens to be the mythical birthplace of Apollo, god of light. More importantly the name was chosen to give recognition to Paul, principal designer of both Delos and Ethos." — David Nagler

Tele Vue is pleased to introduce the Delos, mid-to-short focal length line of 20mm eye-relief, 72° apparent field of view eyepieces. Every optical, mechanical, and ergonomic aspect was rethought to achieve reference-standard performance for any visual application.

The Delos was conceived as a narrower field Ethos. Reducing the field 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 design achieves full field sharpness, virtually perfect f θ (theta) distortion mapping, and color neutrality. Image fidelity is maximized utilizing glass matched multicoatings and anti-reflection surfaces throughout the eyepiece.

Tele Vue 17.3mm Delos 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 reflecting off the first surface and extraneous light from entering your eye pays off in a nice increase in perceived contrast. The eyeguard's sliding action allows for positioning the soft rubber eyeguard at the ideal height to suit the observer's preference. Indicator marks on the eyepiece body are handy reference guides for setting your perfect position. The eye-guard can also rotate for Dioptrx users.

Tele Vue Product Number: EDL-17.3
Manufacturer Tele Vue
Optical Design Delos
Barrel Size 1.25"
Warranty Lifetime Warranty
Eyepiece Field of View - Apparent 72º
Eyepiece Focal Length 17.3mm
Eyepiece Eye Relief 20mm
Eyepiece Manufacturer Series Televue Delos
Eyepiece Weight 14.4 oz.
Field Stop 21.2mm
Number of Lens Elements & Groups Info Not Provided By Manufacturer
Comes with Dust Caps? Yes
Comes with Case? No
Comes with Eye Guard? Yes
  • Tele Vue 72° Delos 1.25" Eyepiece - 17.3mm
  • Dust Caps

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