Ethos 8 mm Tele Vue – 100° Eyepiece

Ethos 8 mm Tele Vue: Key Points

The Ethos 8 mm Tele Vue is an 8-mm astronomical eyepiece offering an apparent field of 100°. It has a 2-inch and 1.25-inch thread and provides 15 mm of eye relief. This configuration is worth considering for star clusters, compact deep-sky objects, and general-purpose observing, depending on the focal length of your telescope.

What is this model best suited for?

The Ethos series is designed for observers who want a very wide field of view around the subject. The Ethos SX models offer an apparent field of view of 110°, compared to 100° for the other Ethos models. This apparent field of view should not be confused with the actual field of view visible through your telescope.

• In 1.25-inch mode with HiHat, it is parfocal with, among others, the Ethos 6 mm, DeLite, and Nagler Type 6 from Group B.
• The manufacturer recommends using it in binocular mode with the 1.25-inch Tele Vue 60° eraser.

Technical specifications

Frequently asked questions

What is the magnification with this eyepiece?
With a telescope that has a focal length of 1,000 mm, this eyepiece provides approximately 125× magnification. The magnification is calculated by dividing the telescope’s focal length by that of the eyepiece.

Is it compatible with my telescope?
The double slide allows for both of the specified formats. Check the clamping position, the focusing travel, and the clearances with your angle drive or focus adjuster.

Can you observe things with glasses?
The specified eye relief is 15 mm. Comfort when wearing glasses also depends on their shape and the position of the eye; trying them on is always better than relying on a universal guarantee. The Tele Vue chart indicates DIOPTRX compatibility; this astigmatism corrector is optional.

Is the apparent field the field visible in the sky?
No. The apparent field of view of 100° describes the view through the eyepiece. The actual field of view depends on the telescope; the field diaphragm diameter of 13.9 mm is the value to use when calculating it.

Before Ordering

Check the focus travel, the focus range, the weight your setup can support, and the compatibility of filters or correctors. The product offered is a Tele Vue Ethos 8 mm eyepiece; the accessories listed are optional. The availability shown reflects our supplier’s status at the time of the last check and does not indicate a reserved quantity.

Features and Compatibility: Tele Vue ETH-08.0 Official Product Sheet.