Tele Vue Ethos 13 mm Eyepiece
"The new Ethos has raised the bar"
First there was the Nagler - the 82° wide field eyepece but now TeleVue is redefining the field again with the introduction of the Ethos - the eyepiece with a stunning 100° apparent field of view!
| The Ethos is dual barreled for 1.25" and 2" focusers and has 15mm Eye Relief |
The 100° compared to the plossl 50° field of view looking at the Andromeda galaxy. |
Due to the size of the eyepiece most people will find the centers of the two eyepieces in a bino viewer too far apart for their eyes! |
Tele Vue were so excited about the Ethos eyepiece that did the Maths to define a new factor call the "Majesty Factor" just to show what a brilliant eyepiece this is and if you want to know how they did it then please visit TeleVue's own page on the Ethos, but for the rest of us mere mortals and non-mathmeticians, the Ethos is "just the biz"!
| What the reviewers said.... |
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The optical performance of this eyepiece is simply outstanding. Aberrations are extremely well controlled - in fact
they are pretty much non-existent. This is quite possibly the best eyepiece that Tele Vue has ever made
BBC Sky at Night Magazine January 2008, review by Tom Trusock |
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Is the Ethos a "must-have" eyepiece? For some, perhaps.Owners of large Newtonian
telescopes will especially appreciate the enhancement of the deep-sky experience.
But be forewarned:After viewing through an Ethos, you’ll find all other
wide-field eyepieces absolutely narrow by comparison.
This review was not intended to be a contest between the highly acclaimed Nagler and the Ethos.However, the Tele Vue Nagler has set the standard for widefield eyepieces for over 25 years; therefore, it was only logical to compare the two. The new Ethos has raised the bar. SkyNews, November/December 2007, review by Todd Carlson. |
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As revolutionary today as the original 13-mm Nagler eyepiece was when it
was introduced in 1981, the 13-mm Ethos sets a new standard for wide-field
observing. The on-axis performance is second to none, while the 100°
apparent fi eld is unprecedented for an astronomical eyepiece.
Sky & Telescope, October 2007, review by senior editor Dennis di Cicco. |
Reviewers Ratings of the Ethos Eyepiece
| BBC Sky at Night Magazine | |
| Build Quality | 98% |
| Ease of Use | 95% |
| Field of View | 100% |
| Optical Quality | 98% |
| Value for Money | 90% |
| Overall | 96% |
| Sky & Telescope | |
| Optical Performance | * * * * * |
| Sensibly perfect. No meaningful improvements possible. | |
Tele Vue 13mm Ethos Specifications
- Apparent Field: 100°
- Focal Length: 13mm
- Effective Field Stop: 22.3mm
- Eye Relief: 15mm (accepts DIOPTRX™ eyesight astigmatism corrector)
- Barrel Size: 2"/1¼"
- Weight: 1.3lbs. / 560g
| Now you can have your own 13mm Tele Vue Ethos Eyepiece from Venturescope for £449.00! |
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