Name: Tele Vue 21mm Ethos 2" Eyepiece
Brand: Tele Vue
SKU: TV21E
Price: 941.00 USD
Availability: InStock
Rating: 5 (8 reviews)

Tele Vue Ethos

Tele Vue 21mm Ethos 2" Eyepiece

Tele Vue

<a rel="nofollow" class="promo-financing short trackEvent popup" data-track-data="financing apply,suggested minimum payment credit,pdp" data-callback-context="adrma" data-callback-arguments='{"financeMonth":"12","financePrice":"79","TotalPrice":"941","financeDateEnd":"12/31/9999"}' data-callback="renderFinancingPromoPopup" data-href="/api/getContent?ContentName=CAFinancingPromo&Output=Desktop" data-popup-class="popup800 popupFinancing">$79/mo suggested payments with 12&#8209;month special financing. Learn&nbsp;how.</a>

In Stock

Adorama Protect 2-Year Protection Plan

Adorama Protect 3-Year Protection Plan

Adorama Protect 4-Year Protection Plan

Adorama Protect powered by Extend is available for purchases to customers in the United States only. Not available for international or U.S. territories purchases. Adorama Protect plans are available for ABS clients.

<a class="percent-off-everyday-promo popup promo-financing trackEvent" data-href="/api/getContent?ContentName=CAFinancingGenericPopup&amp;Output=Desktop" data-popup-class="popupFinancing popup800" rel="nofollow" data-track-data="financing apply,ways to save every day savings,pdp" 
		data-callback-context="adrma" data-callback-arguments="{&quot;financeMonth&quot;:&quot;{1}&quot;,&quot;financePrice&quot;:&quot;{0}&quot;,&quot;TotalPrice&quot;:&quot;{2}&quot;}" data-callback="renderFinancingPromoPopup"><img alt="edge-creditcard" src="/col/assets/edge-creditcard.png">
 <h3>Save 5% Every Day†</h3>with the Adorama Edge Credit Card.Learn More</a>

Adorama

Optics & Binoculars

Telescopes & Astronomy

Telescope Eyepieces

Tele Vue Telescope Eyepieces

Tele Vue Ethos 

Explore the Tele Vue 21mm Ethos 2" Eyepiece with 100° field, 15mm eye relief. Superior image quality. Shop now for unmatched views!

While exploring the celestial wonders, the 21mm Ethos 2" Eyepiece offers an unparalleled "spacewalk" experience. This eyepiece is designed to transform your astronomical journey through the Milky Way, providing a unique blend of contrast, power, and field. It excels in showcasing larger deep sky objects and rich star fields, making it a must-have tool for every stargazer.The 21mm Ethos eyepiece offers a stunning 100-degree field-of-vision, filled with stars. Regardless of where you focus, you'll experience sharpness and richer contrast, enhancing your overall viewing experience. This superior optical performance is the result of meticulous design by Ethos lead designer, Paul Dellechiaie. He has achieved an impressive level of optical aberration correction, consistent with his other Ethos designs.The eyepiece utilizes advanced coating techniques to maximize contrast and transmission. The internal mechanical design techniques, synonymous with all Tele Vue eyepieces, further enhance these features. The 21mm Ethos eyepiece pushes the boundaries of the 2" barrel and focus constraints, providing the maximum true field of view without significant vignetting at the field's edge. It is parfocal with the 31mm Nagler Type 5, offering seamless transitions between views.The 21mm focal length completes the logical set of 21mm/13mm/8mm and complements the 17mm/10mm/6mm combination. Each step within these two sets approaches a 3x field area gain. The 21mm Ethos eyepiece has an effective field stop diameter of 36.2mm, bringing its true field close to the 35mm Panoptic (38.7mm Field Stop diameter). It also offers a larger true field than the 26mm Nagler with its 35mm effective field stop diameter.In an f/4 Dobsonian, the exit pupil is just 5.25mm using the 21mm Ethos, compared to 8.75mm with a 35mm Panoptic, or 6.5mm with a 26mm Nagler. Like all Tele Vue eyepieces, each 21mm Ethos undergoes rigorous optical and cosmetic quality control procedures in Chester, NY. Should your eyepiece ever require service, we can handle everything from replacing a dented barrel to a scratched eyelens.All Ethos models accept Dioptrx, allowing you to compensate for your eyesight astigmatism with a high-quality multi-coated lens providing your exact correction, rotation orientation, and centration over the eyepiece. This is the culmination of our commitment to delivering observing experiences "even better than you imagined," and a 30-year recognition of being "tops in the field."

Very easy and smooth ordering process. Came very quickly, even with covid. The eye piece it did the ip's is great regarding the eye relief. Would highly recommend this piece.

Great eyepiece for your collection

Oh wow!!! It’s so wide I can still use it to do the alignments. But yes views are beautiful.

Outstanding!

The wide angle lets you see the moon close up and fits the entire moon in the viewer.  It's my go to lense for showing objects in the sky.

It's my go to lense for showing objects in the sky.

Scanning starfields across Milky Way yields gazillions of pinpoints of starlight!

Serves up clusters, nebulae galore!

Observing Saturn yields planetary banding, and gap between planet and rings!

Pros:  great brightness, contrast and resolution

Cons:  pricey...

Best binoview ever in Oberwerk BT-100/45

I use it with permanent f/4.5 29-inch Dob, Paracorr and Dioptrx. That's a lot of glass! The field is SO wide that although can see it all looking straight in, must move head to concentrate on edges. Measured throughputs in photometric labs: R=94.7%, G=93.7%, B=91.7% attest to great MARC coatings throughout. Wonderful on remote galaxies. Get one 13mm for your favorite higher mag - full set would be overkill. Use Naglers for other EFLs. Best on fast Dobs, overkill on slow scopes. Buffalo club visited and were all +++ impressed.

Amazing - almost TOO good!

I have used this 6mm eyepiece coupled with a small barlow on a TV-85 to get wonderfully close, sharp views of the moon, planets and other deep sky objects. As with other Ethos pieces, the field of view gives a whole new meaning to the phrase "space walk" - you get the feeling you're looking out a space craft. [...]

More Ethos magic from Tele Vue!

This is great in both my TV 85 and 4" Genesis.  Yes, it is a little expensive but the stunning views will make you forget.  Sell a few of your other eyepieces to afford it if you have to.  You'll be glad you did.

EXCELLENT- best view and contrast!!

I have had the most stunning views of the Moon that I have EVER seen through this eyepiece.  The Veil Nebula (with an O-III filter) was breathtaking!  I am getting rid of other eyepieces because this is mostly what I use now.

Tele Vue 21mm Ethos 2" Eyepiece

Key Features

Product Options

Protect your gear with Adorama Protect.* Learn more