Tele Vue 13mm Ethos Eyepiece
The Tele Vue 13 mm Ethos Eyepiece for both 1.25-inch and 2-inch barrels is part of the Ethos Series delivering a 100 degree field-of-view.
At the 2007 Northeast Astronomy Forum in New York, Tele Vue introduced attendees to a new observing experience with personal views through the new Ethos. With a 13 mm focal length evoking the original 'Nagler' revolution, the field area of this new eyepiece is, at 100 degree, more than 50% larger than an 82 degree field. The Tele Vue 13 mm Ethos eyepiece is essentially multiple eyepieces, delivering the true field size of a longer focal length, narrower apparent field eyepiece with the benefits of higher power and darker sky background.
Tele Vue Optics is known for its in-house eyepiece and telescope designs by Al Nagler. Televue's latest eyepiece brings new meaning to the term 'in-house.' The concept for the 13 mm Ethos eyepiece was first proposed by Tele Vue President David Nagler, with performance parameters giving it the fundamental characteristics (the ethos) of a Tele Vue eyepiece: high contrast, comfortable eye relief and full field sharpness. Control of astigmatism, field curvature, lateral color, angular magnification distortion correction (technical reference), and low pupil sensitivity for daytime use were specified criteria.
Following Tele Vue's philosophy of pushing the state of the art, long-time Televue employee and optical design protege Paul Dellechiaie took up the challenge and designed the basic eyepiece form. Under Al's guidance, Paul tweaked his design to fulfill the original goals. While sharpness is inherent to the optical design, contrast is maximized through the intelligent use of flat finished baffles and ultra low reflectance, high efficiency coatings tuned to the composition of each element.
The Televue 13 mm Ethos eyepiece has now been shown at NEAF, TSP, RTMC, as well as other major astronomy events. The Televue Ethos has been extremely well received by the astronomy community and will be one of the most highly anticipated products to be released in years.
Since it is designed as an 1.25-inch eyepiece, there is NO optical benefit by using a 2-inch holder, however, there is a 2-inch barrel is included just for convenience. The holder is also threaded to accept our Tele Vue's 2-inch extension tube, which allows the use of 48 mm filters.
OPT Product Number: TE-ETH-13.0
All Televue products are available to ship world-wide from OPT, and effective July 1, 2008, are covered by a Five Year Worldwide Limited Product Warranty! Always be sure to save your original packaging materials should you need to return any Televue product for warranty or repair.
|Dust Caps Included||Yes|
|Eye Guard Included||Yes|
|Eye Relief||13mm to 15mm|
|Eyepiece Apparent FOV||100 degrees|
|Eyepiece Eye Relief||15mm|
I got this eyepiece as a gift. I almost could not believe. This eyepiece is great. To own it means many nights of deep observing pleasure. I could recommend it to all who could afford it.
The best eyepiece I've every used. The 1.25 mount with optional 2 adapter means I can use it on any scope, from my personal 150mm refractor to the 14 at the local astronomy club. Great clarity and brightness.
What can I say that has not been said? One heck of an eyepiece. I took this baby down to the Everglades the other night and I felt like jumping into the eyepiece. The sky was so black, the stars so sharp, the FOV, endless. M42 was breathtaking, my best view ever!!! Cant wait to get another one to attempt binoviewing with them.
Redefining the ethos of an eyepiece......
1. Always center an object for the best view. 2. The field edge is only good for framing the object. 3. Eyepieces >70 deg FoV are mega-ultra-hyper-uber wide angle. Accept that compromise in edge quality. How times change!
Worth every penny..
Scary , this eyepiece brings you there ! Falling in truly does describe the view with this eyepiece. The satisfaction received when viewing through binoculars is duplicated with only one eye with this one , I cant wait to get two of these side by side in a bino configuration ! I do not want to look into the milkyway , I want to STAND IN IT ...and with this eyepiece , YOU DO! Very comfortable and easy to use and after about 15 minutes with it , it is not there and you are in outer space :- , you and scope become one. I have absolutely nothing negative to say about this wonderful eyepiece and 13mm is a nice starting point .