TeleVue Ethos 6mm - 6mm XWA Eyepiece

TeleVue Ethos 6mm: 6mm XWA Eyepiece: Ethos eyepiece with 100-degree field of view

The Ethos 6 mm belongs to the 17 mm, 10 mm, and 6 mm series, where each step reduces the field of view by approximately three times in area. As the highest magnification in this series, it is the eyepiece for planets and small deep-sky objects.

Thanks to the double-sided fitting, the eyepiece can be used in both 1.25-inch and 2-inch focusers. In 1.25-inch mode, it is parfocal with other short TeleVue eyepieces.

What a 100-degree field of view does

A classic Ploessl has 50 degrees, a Nagler has 82 degrees. At 100 degrees, your eye can no longer take in the field at once: you’re looking around the image instead of *at* it. That’s the effect the Ethos series is known for.

Practically, this also means that objects remain in view for longer. On a manually tracked Dobson, this saves constant readjustment.

Sharpness to the edge

The optical design corrects astigmatism, field curvature, lateral color, and distortion of magnification. Even in an f/4 system, stars at the edge remain point-like.

With a fast f-ratio Newtonian telescope, coma is the limiting factor. The Paracorr coma corrector resolves this and increases magnification by a factor of 1.15.

Viewing Comfort and Dioptrx

The eye relief is 15 mm at every focal length in the series. The height of the foldable eyecup is adjustable, so your eye is always in the same position.

If you wear glasses due to astigmatism, you can replace them with Dioptrx on the eyepiece. This corrects your own cylindrical aberration without the eyeglass lenses costing contrast and eye distance.

In your telescope

In a telescope with a focal length of 1200 mm, this eyepiece provides approximately 200x magnification with a true field of view of about 0.50 degrees. You calculate that for your own telescope using the field stop: true field of view = 57.3 x field stop divided by the telescope's focal length.

The field stop of this model is 10.5 mm. That number, not just the focal length, determines how much sky you actually see.

Included

• Foldable rubber eyecup
• Eyecup protector
• Dust cover for the stitch
• Filter thread abandoned

Featured accessories

Every Ethos eyepiece is compatible with the TeleVue Dioptrx, a corrector for astigmatism that allows you to observe without glasses. If you’re using a fast Newtonian, the Paracorr coma corrector will bring out that last bit of edge sharpness. For a 2-inch focuser, an Everbrite zenith mirror is the logical addition, and an eyepiece case protects your investment while on the go.

For whom yes and for whom no

• ✓ Planets and double stars
• ✓ Small planetary nebulae and globular clusters
• ✓ Observers building a 17, 10, and 6 mm series
• ✗ Overview observations of large nebulae
• ✗ Telescopes where this magnification is too high

Specifications

All wide-angle eyepieces are on the page featuring wide-field eyepieces. You can find the complete selection of this merk on the TeleVue merk Page.