Tele Vue 31mm 2" Nagler Type 5

$665.01

Availability: More on the way

This Nagler Type Five eyepiece uses a new six-lens design that reduces the size and weight of this 31mm eyepiece to less than that of the previous generation 20mm Nagler . . .
Our Product #: TN31
TeleVue Product #: EN5-31.0
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Product Description

This Nagler Type Five eyepiece uses a new six-lens design that reduces the size and weight of this 31mm eyepiece to less than that of the previous generation 20mm Nagler. Had the previous-generation seven-lens Nagler design been used in a 31mm focal length, the resulting eyepiece would have been the size and weight of a bowling ball!

The six-lens design uses multiple rare earth glass elements. Some of the lenses are actually over 70mm (2.75") in diameter, larger than the objective lens of the TeleVue Pronto telescope!

Please note the 35 ounce weight of this superb eyepiece, however. It may pose a balance problem with some Dobsonians when switching to the 31mm from a much lighter shorter focal length 1.25" eyepiece. Its use may require some temporary rebalancing of your scope, or the use of a TeleVue #TVEQC equalizing adapter with 1.25" eyepieces to avoid balance problems.

While easily the most expensive commercially-available eyepiece made, it is a surprising best-seller, particularly with owners of large premium-quality Dobsonians who swear by its huge exit pupil and "picture window on space" performance.

Tech Details

Barrel Size 2"
Eye Relief 19mm
Field of view 82
Focal Length 31mm
Number of optical elements 6
Weight 35 oz
Warranty Limited Lifetime

Reviews

Review by:
Like the Ethos 21mm, this eyepiece is a wonder field wide field addition to just about any setup. It has a slightly wider field of view than the Ethos 21 and larger exit pupil, which is nice for use with filters. When I show people views through this and the Ethos, most people prefer this eyepiece. It's a toss up for me, so I keep them both. (Posted on 11/1/2019)
Review by:
This is a top shelf eyepiece! It has given some beautiful wide field views [29x] in my Apo refractor. Compared to a similar 82° eyepiece, the colors are more vibrant in the 31T5, and the sky background is velvety black. Nebulae and galaxies really pop out against the blackness of space, and finer details can be seen within them. This is definitely an eyepiece I will keep for a lifetime!
Also, a shout-out to those at Astronomics! Very friendly customer service, fast shipping, and a Cloudy Nights discount! Keep up the good work! (Posted on 9/25/2019)
Review by:
This is a top shelf eyepiece! It has given some beautiful wide field views [29x] in my Apo refractor. Compared to a similar 82° eyepiece, the colors are more vibrant in the 31T5, and the sky background is velvety black. Nebulae and galaxies really pop out against the blackness of space, and finer details can be seen within them. This is definitely an eyepiece I will keep for a lifetime!
Also, a shout-out to those at Astronomics! Very friendly customer service, fast shipping, and a Cloudy Nights discount! Keep up the good work! (Posted on 9/21/2019)
Review by:
I use the 31mm Televue Nagler with a 10" Meade LX600 SCT. Although expensive, I believe "you get what you pay for" with this eyepiece. The wide field view is stunning, seductive and awe-inspiring. If you want the highest quality in a wide field eyepiece, the 31mm Televue will not disappoint. (Posted on 7/29/2019)
Review by:
High quality and legendary, the Nagler 31 mm is the wide field low power eyepiece to beat.
Great eyepiece to scan the night skies. In my 15inch Dobsonian reflector it is a must in my eyepiece case. (Posted on 7/22/2019)
Review by:
I have a 12.5 " reflector scope. This eyepiece gives magnificent views at a magnification of 55 X with my scope. I would highly recommend it to anyone who owns a decent scope. I used to have an 18" and it was one of favorite eyepieces to use with it as well. (Posted on 12/27/2018)
Review by:
This is, by far, my favorite eyepiece. The views are panoramic and stunning in my AP130EDF-GT and Meade LX200GPS-16. The newer Televue eyepieces are great but I keep coming back to my trusty hand-grenagler! (Posted on 12/6/2018)
Review by:
This is a great eyepiece. It is the only one of the Naglers that I still use (having switched to Ethos). The apparent field of view is wide and sharp. Whether it's Andromeda stretched across the field of view of a small APO or a cluster of distant galaxies in a large dob, this eyepiece has provided me with some of the most memorable views over the years. (Posted on 11/20/2018)
Review by:
This is the best wide field eyepiece available today. It has plenty of eye relief and, as opposed to the 21mm Ethos eyepiece, it has a much more comfortable "presentation" and is not as fatiguing to use. The 31mm Nagler displays a flat field when coupled with my NP 101. Go ahead and buy this fantastic eyepiece - you will not regret it. (Posted on 11/17/2018)
Review by:
This is a fantastic wide field eyepiece. It is truly sharp to the edge in my NP 101.
(Posted on 11/17/2018)
Review by:
Everyone with any telescope should have one of these, when they can afford it. To my knowlege their is nothing else on the market with both this optical quality and field of view at 31mm FL . I don't use it every time I observe but it never fails to impress when I do look through it . Even with my smallest scope ( 80mm f6 APO ) ! As others have pointed out it is quite heavy and is 2" . I have a large premium eyepiece collection and this is one of my top favorites. It is unique and terrific ! (Posted on 11/14/2018)
Review by:
There's little doubt that this 31T5 Nagler is the best overall widefield eyepiece for most scopes. Though I endorse and highly recommend high power observing when appropriate and possible, this 31T5 is one of my most used eyepieces. It is essential for the large objects, large fields and for framing smaller objects in really sharply rendered fields. (Posted on 10/30/2018)
Review by:
I always start out with this eyepiece. In an 18-inch Dob, it gives a low-power magnification with a terrific wide field of view. When you are looking at open clusters or galaxies, this is quite often the best eyepiece to use. It's great at star parties, too, because it helps members of the public see things more easily. This is a very heavy eyepiece, and it may require an additional adjustment or two to your mount in order to achieve balance, but the quality is worth it. (Posted on 10/29/2018)
Review by:
I had a chance to look thru a variety of TeleVue naglers recently and having never looked thru a super high quality eyepiece it was an eye opener (no pun intended) lol. the 31mm with it's wide FOV was breathtaking. Know this though: its big and heavy and not cheap by any means. I give it 5 stars because its definitely the finest eyepiece i have ever viewed thru. I feel that some other much less expensive eyepieces come very close to this performance ( the Meade 5000 Ultrawides for example) but as with anything else, you'll pay a premium for the very best out there, and televue delivers as usual. If you have the means to invest in such fine eyepieces you wont be disappointed. (Posted on 10/28/2018)
Review by:
This is my favorite eyepiece. It gives a very wide and expansive view of the skies. I always start out my night with it.
It works well in mid-to-large dobs and also in my shorter focal length refractor. It is great for scanning the skies.
It is heavy (over 2 pounds), so it tends to weigh smaller dobs down a bit (my son has an 8" and this is too heavy for it without some sort of counterweight.)
Additionally, because of the extremely wide field and low power it offers, it is very useful at the beginning of the night when trying to find alignment stars for your go-to or push-to.
This was our first high-quality eyepiece and it truly made an immediate improvement in our viewing experiences. (Posted on 10/6/2018)
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