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Tele Vue 1.25" Delos Eyepiece - 4.5mm

5.0 (3 Reviews) Read Reviews Write Review
Brand TeleVue
Part Number EDL-04.5
Availability available

Product Info

Manufacturer Description

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.

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.

All Tele Vue Delos eyepieces have proprietary tuned full multi-coatings, blackened lens edges, high index glasses, fold-down eyeguards, rubber grip rings, cover for the eyeguard, an undercut in the barrel for extra locking security, and filter threads. The Delos eyepieces are parfocal up to the focal length of 12mm within the series, and with several other TeleVue eyepieces. All Tele Vue eyepiece lines are proprietary, in-house designs manufactured to their specifications and tolerances. Every eyepiece is individually tested at Tele Vue to ensure it meets high optical and cosmetic standards.

Concept: "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

Reviews

5.0 (Based on 3 Reviews) 100% of reviewers recommended this product.
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    1. Guest

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      User Notes:
      Review by Benjamin S.
      1491503307
      Apr 6, 2017

      5.0 Tele Vue Does It Again!

      Pros:

      Cons:

      Comments:

      Ya just can't beat a Delos!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Skill Level
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      User Notes:
      Review by Markus of Canada.
      1461196800
      Apr 20, 2016

      5.0 Outstanding eyepiece!

      Pros:

      Strong Construction,Excellent On Planets,Accurate,Quality Lenses,Easy to Use

      Cons:

      Comments:

      Bought this back in Sept 2014, but eventually had to sell for financial reasons. Incredibly good eyepiece and even easier to view through than the 6mm Delos. Awesome on planets as well as everything else. IMO, this is the perfect 4.5mm eyepiece out there!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      User Notes:
      Review by Salia of Long Island, NY.
      1408147200
      Aug 15, 2014

      5.0 Incredible!

      Pros:

      Strong Construction,Quality Lenses

      Cons:

      Heavy

      Comments:

      Best eyepiece in my collection. I was initially concerned that the focal length was too low, and that I would only be able to enjoy this on the best nights, which are rare. But this eyepiece is so good, I have used it on humid nights with average seeing, and it still blew me away with the views. Expensive, yes, but worth every penny. And Agena's fast shipping, as always, is appreciated.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Specifications

      Apparent Field of View 72°
      Barrel Size 1.25" (31.7mm)
      Bolt Case Included Yes - Free Agena Eyepiece Container
      Bolt Case Size Agena 65x120mm
      Coatings Fully Multi-Coated
      Max Width 2.2" (55.9mm)
      Eye Relief by Design 20mm
      Field Stop Diameter 5.6mm
      Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
      Focal Length 4.50mm
      Parfocal Yes
      Rubber Eye Guard Yes
      Blackened Lens Edges Yes
      Additional Information

      - Suitable for use with Tele Vue Bino Vue binoviewer
      - Suitable for use with Tele Vue Dioptrx / digiscoping

      Manufacturer TeleVue
      Eyepiece Focal Length 5mm and Under
      Eyepiece Field of View 71 - 80 degrees
      Eyepiece Series Tele Vue Delos
      Barrel Type With safety undercut
      Eyepiece Weight 17.60oz (498.95g)