TeleVue - 17.3mm 72° Delos Eyepiece

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Tele Vue is pleased to introduce the 17.3mm, Delos eyepieces, the first available focal lengths in a newmid-to-short focal length line of 20mm eye-relief,72° apparent field of view eyepieces.

SKU: TEL-EDL-17.3
Manufactured by:
TeleVue
 

Product Description

TeleVue 17.3mm 72° Delos Eyepiece

TeleVue is pleased to introduce the 17.0mm Delos eyepiece, the first available focal lengths in a new 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.

  • This Tele Vue Delos Eyepiece has a 20.0mm eye relief.
  • Continuously adjustable height eyeguard system that can be locked in any position.
  • This TeleVue 17.3mm Delos Eyepiece achieves full field sharpness, virtually perfect f θ (theta) distortion mapping, and color neutrality.
  • Realistic 72° apparent field of view

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 ƒθ (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 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.

 

Specifications

Name TeleVue - 17.3mm 72° Delos Eyepiece
Manufacturer TeleVue
Model TEL-EDL-17.3
Apparent Field of View 72°
Eye Relief 20mm
Eyepiece Barrel Size 1.25"
Field Stop Diameter 21.2 mm
Focal Length 17.3mm

Reviews

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Review by:
In Comparison with my ES 14mm 82degrees.

----more undistorted field for outer view.(perfect 72degs)
----adjustable height eyecup.
----reasonable price.

----easy to recommend friends.
(Posted on 6/3/2016)
Review by:
I have a mixed collection of Ethos, Pentax XW, and Nagler eyepieces and wanted see how the Delos line compared. This unit was purchased at RTMC. First light for the new 17.3 Delos was at 7200' in the White Mtns. through a 20" f/5 dobsonian. The globular cluster M92 drifted across the field and I was delighted with the crisp pinpoint stars, resolved to the core. The color was very neutral and I was amazed at the brightness. Galaxies were contrasty and stars were sharp edge to edge. Sharpness, contrast, and overall quality compare very well with the Pentax XWs, and I plan to collect more of this line. (Posted on 1/19/2014)
Review by:
I have a mixed collection of Ethos, Pentax XW, and Nagler eyepieces and wanted see how the Delos line compared. This unit was purchased at RTMC. First light for the new 17.3 Delos was at 7200' in the White Mtns. through a 20" f/5 dobsonian. The globular cluster M92 drifted across the field and I was delighted with the crisp pinpoint stars, resolved to the core. The color was very neutral and I was amazed at the brightness. Galaxies were contrasty and stars were sharp edge to edge. Sharpness, contrast, and overall quality compare very well with the Pentax XWs, and I plan to collect more of this line. (Posted on 1/19/2014)
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