46 replies to this topic

[dalbert02]

I have an OCD problem where I like all my eyepieces to match.  I think I settled on Tele Vue Naglers.  However, I think the Nagler 31mm might be "too much" for a lowly TV-85.  I mean it is practically 1/2 the size of the scope.  Is this too much?  I have a Nagler 9,13, and 22 and the 22 seems huge.  I can't imagine the 31mm.  Now if I could get them all in the same type I'd be super happy   I share my eyepieces with a Celestron 6" Evolution.  I imagine one day I might upgrade or add a TV127 and change the 6" for an 9"  or larger but that won't be for a while.  What would you do?

[dnrmilspec]

31 Nagler is one of those EPs that you just keep.  I have had two of them over the years.  I do not think it too large for your TV85.  I use it with my 80 Apo frequently as a sky sweeper and it is gorgeous.  In fact I use it with just about everything. 

The price is steep for sure but it will be in your kit for decades to come.

[rollomonk]

What would you do?

A nagler 31 would give 19x magnification, 4.2° FOV, and a 4.4mm exit pupil. Your nagler 22 gives 27x, 3.0° FOV, and a 3.1mm exit pupil. Personally, I wouldn't spend the money since they are so close and the 31 is so large, heavy and expensive. But if someone were to give me one, I'd be happy to use it!

Edited by rollomonk, 24 September 2023 - 09:46 PM.

[Rick-T137]

I had a friend with a Tele Vue Pronto (70mm!) and he loved to use his 31 Nagler in it. I got to take it for a spin a few times, and I thought it was amazing. Wasn't sure which end to look in at first, though... !

 

Rick

[GGK]

I have an OCD problem where I like all my eyepieces to match.  I think I settled on Tele Vue Naglers.  However, I think the Nagler 31mm might be "too much" for a lowly TV-85.  I mean it is practically 1/2 the size of the scope.  Is this too much?  I have a Nagler 9,13, and 22 and the 22 seems huge.  I can't imagine the 31mm.  Now if I could get them all in the same type I'd be super happy   I share my eyepieces with a Celestron 6" Evolution.  I imagine one day I might upgrade or add a TV127 and change the 6" for an 9"  or larger but that won't be for a while.  What would you do?

The 31mm Nagler is outstanding in the TV-85. I also use the 22mm Nagler and 21mm Ethos. For widest field, I use the 40mm Pentax XW. The 31mm Nagler, though, is one of my most used eyepieces in all of my refractors, including the 60mm. I see more of the faintest stars with the Nagler than my other 28mm to 30mm eyepieces except the 30mm XW. The light throughout is superior. Some complain about the weight, but my mounts are balanced for and have no issue with heavy eyepieces, and this isn’t the heaviest one I have. 

 

Note that I’m usually under Bortle 4 to 5 skies, love wide field observing, and use Dioptrx with the 31mm Nagler to counter my eye astigmatism. I do not wear glasses while observing. 
 

Gary

[Tank]

Overall the 31t5 is fantastic no complaints
I picked up the 25es100 thats the only eypiece that was able to kick out the 31t5 out of my stable
28uwan was awesome too just a bit less fov

[Lizardman]

Great question

[Jethro7]

Hello dalber102,

The TV85, is not too small for a Nagler 31 as far as being able to view with the eyepieces, the views will be marvelous. I use this eyepiece with a Tak FOA-60Q. If you have an issue anywhere, it will be in balancing your scope on the mount. I like many others here the Nagler 31, is a favorite. 

 

 

HAPPY SKIES AND KEEP LOOKING UP Jethro

[alnitak22]

Great question

With great answers.

[Jon Isaacs]

A nagler 31 would give 19x magnification, 4.3° FOV, and a 4.4mm exit pupil. Your nagler 22 gives 27x, 3.7° FOV, and a 3.1mm exit pupil. Personally, I wouldn't spend the money since they are so close and the 31 is so large, heavy and expensive. But if someone were to give me one, I'd be happy to use it!

 

They're actually quite different. 

 

The TFoVs based on field stop: 4.01°, 2.97°  this is a big difference. 

 

The 31 mm Nagler is 2x brighter, important for viewing large faint nebulae with filters. 

 

19x to 27x is a significant increase in magnification.

 

Myself, the 41 mm Panoptic, 31 mm Nagler and 21 mm Ethos. They're a good fit for F/6 and F/7 refractors under dark skies. The 41 mm provides the widest brightest views, 4.4° and 75° brighter than the 31 mm Nagler.

 

The 28 mm UWA (Astro-Tech or Stellarvue) is a nice alternative to the 31 mm Nagler. It's 2/3s the weight and provides a 3.90° field. It's $200 and nearly as sharp as the Nagler.

 

I use these regularly in my 80 mm F/6 and 90 mm F/6.2 FPL-53 doublets as well as the NP-101 (and my Dobs as well.)

 

Jon

Edited by Jon Isaacs, 24 September 2023 - 07:28 PM.

[havasman]

Here? No. But you make the call for you. There is no absolute against which you measure your choice.

[alnitak22]

Here? No. But you make the call for you. There is no absolute against which you measure your choice.

Very true. For my sky with limiting mag of 4.8 to 5.0, the 22 Nagler is the perfect low power eyepiece with my TV85. If I lived under dark skies, I’d definitely have the 31 Nagler as well.

Edited by alnitak22, 24 September 2023 - 07:50 PM.

[KWB]

I 

 

I have an OCD problem where I like all my eyepieces to match.  I think I settled on Tele Vue Naglers.  However, I think the Nagler 31mm might be "too much" for a lowly TV-85.  I mean it is practically 1/2 the size of the scope.  Is this too much?  I have a Nagler 9,13, and 22 and the 22 seems huge.  I can't imagine the 31mm.  Now if I could get them all in the same type I'd be super happy   I share my eyepieces with a Celestron 6" Evolution.  I imagine one day I might upgrade or add a TV127 and change the 6" for an 9"  or larger but that won't be for a while.  What would you do?

Hello

 

I have a similar sized ED refractor to your telescope. This is what I did recently.

 

My first team starting lineup of eyepieces are all recent TV Nagler 82 degree AFOV design eyepieces except for my low power 2 inch eyepiece. The 31 T5 is physically too large for my tastes and would create a balance issue using my 80mm F/7 telescope. I find the AT 28mm UWA an acceptable substitute and I am more than willing to give up a .10 degree of TFOV to aid in my balancing my telescope. I can also deal with a little less than axial perfection using the AT eyepiece instead of using the big Nagler.

 

It is good enough for me and I have no problem matching it to my other TV eyepieces.

 

Edited by KWB, 24 September 2023 - 08:43 PM.

[Lizardman]

With great answers.

Well that’s for the OP to decide

[alnitak22]

Well that’s for the OP to decide

Yeah…that’s what several of the answers actually said!

Edited by alnitak22, 24 September 2023 - 08:25 PM.

[Lizardman]

Yeah…that’s what several of the answers actually said!

Whatever . I only meant it’s was an interesting question . You seem to like to get off topic . Have a nice life.

Edited by Lizardman, 24 September 2023 - 08:27 PM.

[Jon Isaacs]

I find the AT 28mm UWA an acceptable substitute and I am more than willing to give up a .40 degree of TFOV to aid in my balancing my telescope.

 

It;s more like 0.1 degrees... 

 

Jon

[alnitak22]

Whatever . I only meant it’s was an interesting question . You seem to like to get off topic . Have a nice life.

Ha! Pot..kettle. And you too!

[KWB]

It;s more like 0.1 degrees... 

 

Jon

You are correct, my friend. My typo once again. I can't type worth spit and never could. 

[dalbert02]

I know no one can decide for me, but I truly enjoy hearing other people's experience and perspectives.  I don't want to make a $700 mistake.  Sometimes I don't know what I don't know and hearing others share their thoughts is very much appreciated.  Thank you.

[Joe in Gatineau]

I replaced my Panoptic 35mm with the Nagler 31mm a few years ago when I got a good deal on a used one & no regrets.

 

All the other eyepieces I use with my TV 85 are Ethos (17-13-8-4.7) & the Nagler Zoom 6-3mm. According to the website "Good to Stargaze", my bottle is 7.2.

[25585]

I had a 35mm Panoptic, it was not as heavy as a 31N, and I used the 35 for terrestial as well. 

[John Huntley]

I use my 31mm Nagler with my 70mm F/6 ED and the 6 degree true field views are great 

 

To be fair though, mostly the big Nagler is used in my larger scopes.

 

 

 

 

 

 

[Scott99]

The Nagler 31 would be better-suited to a shorter refractor like the NP127 IMO.  I've used the N31 many times because all my friends with f/5 dobs have them.

 

But the weight of the N31 and Panoptic 41 have always bothered me, truly in the "behemoth" weight class.  It's just a little too much for a small refractor IMO.    In time I gravitated toward the Pentax XW30mm and 40mm which are lighter, they are more in line with the weight of the 35mm Panoptic. 

 

The 30mm works well down to f/5, the 40mm is better at f/7 or f/8 and up.  I didn't realize how much of a price difference there now is between these two ep's and the big Tele Vues.  The XW's are now one of the best values out there in premium ep's today for me....the glass and the coatings seems like the best quality to me.

Edited by Scott99, 25 September 2023 - 01:25 PM.

[25585]

https://www.cloudyni...cial-eyepieces/