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Equipment Discussions >> Eyepieces

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Jon Isaacs
Postmaster
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Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm ? new [Re: Damo636]
      #5568784 - 12/13/12 08:02 AM

Quote:

I don't know if its my eyes, but the 31 Nagler has the worst pincussion distortion I have ever seen! The ES to my eyes has a much flatter field.




A flat field means that the entire field is in focus at the same time. In my experience, the 31mm Nagler has a very flat field.

Pincushion distortion is something else all together.

Jon


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Damo636
sage


Reged: 08/16/11

Loc: Co Fermanagh, Northern Ireland
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm ? new [Re: Jon Isaacs]
      #5568871 - 12/13/12 09:27 AM

You are correct Jon, I'm getting my aberrations mixed up The 31 Nagler has a flat field but, for example, panning through the Milky Way, its as if the field is bending, almost like looking through a fishbowl! It doesn't bother me as I don't tend to observe in this manner, but I can see how some have experienced a feeling of motion sickness as a result. I found the ES to be much better in this regard!

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Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm ? new [Re: Damo636]
      #5569521 - 12/13/12 04:12 PM

What is the exact weight of the 30mm ES N2 82? I was thinking of selling my Orion 38mm Q70, and getting a 30mm ES N2 82 for better edge correction and a smaller exit pupil.

Are they 3 pounds?

Cheers,


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Damo636
sage


Reged: 08/16/11

Loc: Co Fermanagh, Northern Ireland
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm ? new [Re: Scanning4Comets]
      #5569561 - 12/13/12 04:43 PM Attachment (41 downloads)

Its slightly heavier than the 31 Nagler Mark....

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Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm ? new [Re: Damo636]
      #5569573 - 12/13/12 04:54 PM

That's not too bad at all! Just over 2 pounds would be ok! Thanks for putting the 30mm on the scale Damo! I thought they were 3 pounds....but just over 2 is fine !!!

I'm thinking of selling up my 38mm Q70 and grabbing one of these!!! I love the eyepiece pron. :^)

Cheers,


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Djarum
scholastic sledgehammer
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Reged: 03/12/09

Loc: Huntsville, Al
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm ? [Re: Scanning4Comets]
      #5569601 - 12/13/12 05:14 PM

Good comparison. Thinking about getting the ES to replace my AT Titan II 40mm. The ES should give me similar FOV at more magnification.

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csrlice12
Postmaster
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Reged: 05/22/12

Loc: Denver, CO
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm new [Re: johnnyha]
      #5570472 - 12/14/12 08:46 AM

Quote:

Do y'all think there is a market for "astro eyeglasses" that are smaller and inset quite a bit closer to the eyes? My optometrist says can do pretty much anything and he works with these tiny eyeglasses that I would bet could easily be altered to make it easier to get the eye in closer to the eyepiece... He used Zeiss coatings on my newest pair of regular glasses when I told him I was into astronomy.




Wow, a doctor who does what he can to help his patients??? That's a rare thing these days....congratulations!

They would probably be great for those with astigmatism, but they'd have to be by prescription only....


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Starry eyes
super member


Reged: 04/30/10

Re: TeleVue Nagler 31mm vs Explore Scientific 30mm new [Re: csrlice12]
      #5571932 - 12/15/12 01:59 AM

One important feature that the Nagler 31mm can make use of is the Dioptrix. I have a Dioptrix on my 31mm so I don't need eyeglasses for my visual use. I find that the combination of the Paracorr II, 31 Nagler, and Dioptric is a real treat to use on my F4.5 scopes. I don't know if anybody else has this complete system so well dialed in.

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bherv
Carpal Tunnel
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Reged: 03/10/06

Loc: WMass
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm new [Re: Starry eyes]
      #5572263 - 12/15/12 09:56 AM

I had a chance to do a side by side comparison of the two. I found that both are excellent eyepieces. One thing I found surprising was that despite
the slightly higher magnification of the ES 30 it actually seem to have a larger total field of view. I was using a 17.5" f/4.5 with a Paracorr for the test. The ES 30 is definitely a great value at 1/2 the price of the 31 Nagler.
Barry


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ohioalfa64
sage


Reged: 08/16/12

Loc: Ohio (NW)
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm new [Re: bherv]
      #5580755 - 12/20/12 01:59 PM

My ES 30mm 82-N2 arrived today. Yes, it weighs in at 2 lbs 4 oz. It is the size of a large Hermes Egg. It is huge to hold in your hands. Its like softball size.

Can't wait to see it in my Dob (12.5" f4.0), paracorred of course (to f4.6).


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Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm new [Re: ohioalfa64]
      #5581812 - 12/21/12 02:21 AM

Quote:

I had a chance to do a side by side comparison of the two. I found that both are excellent eyepieces. One thing I found surprising was that despite
the slightly higher magnification of the ES 30 it actually seem to have a larger total field of view. I was using a 17.5" f/4.5 with a Paracorr for the test. The ES 30 is definitely a great value at 1/2 the price of the 31 Nagler.
Barry.




What's the 30mm ES 82 like w/o a Paracorr @ F/4.7? From your review Alexis, you said you could see field curvature.
I detest FC and can put up with a bit of coma more.


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csrlice12
Postmaster
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Reged: 05/22/12

Loc: Denver, CO
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm new [Re: ohioalfa64]
      #5582170 - 12/21/12 09:55 AM

Quote:

My ES 30mm 82-N2 arrived today. Yes, it weighs in at 2 lbs 4 oz. It is the size of a large Hermes Egg. It is huge to hold in your hands. Its like softball size.

Can't wait to see it in my Dob (12.5" f4.0), paracorred of course (to f4.6).




The old, nonwaterproof version weighs in at 3.08lbs, but what an eyepiece!


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Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm [Re: csrlice12]
      #6010068 - 08/06/13 06:31 PM

Here I am back at this thread again !!!!

Deciding between another 34mm ES 68 or a 30mm ES 82. Don't know which one to get this time !!!


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JustaBoy
Post Laureate
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Reged: 06/19/12

Re: TeleVue Nagler 31mm vs Explore Scientific 30mm [Re: Scanning4Comets]
      #6010087 - 08/06/13 06:42 PM

Hi Markus,

Well, I know that you like your 100° eyepieces, and since 82° is closer to 100° than 68° is, then you could get the 30/82.

Simple <g>

Also, since you have had a 34/68 in the past, and you know how you like to try new things...

Simple again!

Anything else I can help you with, Sir?

-Chuck


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csrlice12
Postmaster
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Reged: 05/22/12

Loc: Denver, CO
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm [Re: JustaBoy]
      #6010150 - 08/06/13 07:20 PM

Why not get both the 34 68* AND the 30 82* and remove all doubt?

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Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm [Re: JustaBoy]
      #6010152 - 08/06/13 07:21 PM

I never really gave the 34mm ES enough time and I didn't do any reports on it....so I totally forget how it performed in my scope! So....not so simple at all!

The 30mm ES 82 will have better correction, but I am trying to consider the weight of that as well compared to the weight of the 34mm ES 68....Not sure what to do this time around!


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JustaBoy
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Reged: 06/19/12

Re: TeleVue Nagler 31mm vs Explore Scientific 30mm [Re: Scanning4Comets]
      #6010188 - 08/06/13 07:38 PM

*Not sure what to do this time around!*

Considering if you get the 34/68 that you will have a $50 head-start on your next eyepiece purchase after this one...

Hmmmmm?


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mattyfatz
Carpal Tunnel
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Reged: 12/27/06

Loc: Boise Idaho
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm [Re: Scanning4Comets]
      #6010220 - 08/06/13 07:56 PM

I'm sorry to rain on the Explore Scientific parade, but I have to do it again.
I was really excited about these eyepieces at first. I was convinced they would meet my needs. I currently own 2 of the 82* examples. People are pleased with the ES eyepieces when they upgrade from the standard Plossls that most scopes come with. I bought mine in lue of buying Televue's. I have been disappointed with that decision ever since
Comparing them head to head with Naglers is just ridiculous. It's like comparing a Porsche 911 to a VW Jetta .. Sure their both German, sure they both have six cylinder engines.. and they both will get you down the road, but is there really any question as to performance? If price wasn't an option which one would you own? The ES models are not crisp and flat to the edge, so the full FOV is not usable. In a Televue, if the FOV is advertised at 82* it really is that.


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tonyt
professor emeritus


Reged: 09/02/09

Loc: Australia
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm new [Re: mattyfatz]
      #6010244 - 08/06/13 08:09 PM

Quote:

I'm sorry to rain on the Explore Scientific parade, but I have to do it again.




It's ok to rain on the parade, but you need to be specific about which eyepieces you've compared. There's considerable variation in performance of the different ES eyepieces. The ES30mm is an excellent eyepiece in my experience.

Edited by tonyt (08/06/13 08:09 PM)


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beatlejuice
Pooh-Bah
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Reged: 04/05/11

Loc: Hamilton, ON,Canada
Re: TeleVue Nagler 31mm vs Explore Scientific 30mm new [Re: mattyfatz]
      #6010262 - 08/06/13 08:17 PM

Quote:

I currently own 2 of the 82* examples.




Quote:

I have been disappointed with that decision ever since




Would one of them be the 14 and be for sale by any chance?

Eric


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