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Equipment Discussions >> Eyepieces

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Astrojensen
Post Laureate
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Reged: 10/05/08

Loc: Bornholm, Denmark
First real test of my ES 82 eyepieces
      #5659928 - 02/03/13 12:48 PM

Hello everyone!

Last night brought finally brought a clear sky with no moon. Transparency was variable and the SQM hovered around 21.05. Good, but not excellent.

I tested my new ES 82 eyepieces on deep-sky objects with several telescopes: My 150mm f/8 achromat, my 70mm f/6 ED and my 12" f/5 Meade Lightbridge.

In the 150mm refractor, the ES 30 is a super stunning wide field performer. Stars, except for the very brightest, are so sharp, they seem to have no dimensions. Observing rich star fields with this combo was a breathtaking experience. Highlights include the entire sword of Orion, M35 and NGC 2158, NGC 891 floating among countless stars, NGC 7789 in Cassiopeia as a rich swarm of pinpoint stars in a very rich field. And of course the Double Cluster. Forgive me, but I forgot the Pleiades!

In the 12", it's a stunning low power eyepiece. Coma is well controlled. It isn't sharp to the edge, but it's really good.

In the 72mm f/6, it's not sharp to the edge at all. I have to refocus a lot. This detracts a bit from the aesthetics.

In all scopes it is an extremely comfortable eyepiece.

*

The 18mm just plain works in every scope I stick it into. Sharp to the edge, except in the 12", where there's a minor unsharpness near the edge, from coma. Extremely comfortable on all scopes.

*

11mm: A superb deep-sky eyepiece on the 150mm refractor. Sharp to the edge and pleasing dark background and still lots of field for medium size objects. Equally at home on the 12" and sharp to the edge, as far as I could judge. Extremely good views of galaxies.

*

8.8mm: Fantastic high power eyepiece, especially on galaxies in the 12". Also superb on the 150mm refractor. It was better on galaxies in the 12" than the 11mm, due to the higher magnification and darker background.

*

I tested the 11mm ES 82 against a 10mm Zeiss Jena ortho, using faint stars in and near NGC 2158 to judge the transmission. Both resolve numerous stars in NGC 2158. I could not detect a difference between them. I never found a star I could see in one that I could not in the other, with the same amount of averted vision and time. They felt so alike that apart from the huge difference in apparent and true field and ergonomics, it was near impossible to tell them apart. This is extremely remarkable, since the 10mm, given its slightly higher magnification, should have done better resolving the cluster and darkened the sky background and showed fainter stars. I saw no such clear effect. In the end, I had to declare it a draw. Or maybe I should declare the ES a clear winner, since it was showing the same as the 10mm Zeiss, but at a longer focal length, had infinitely better ergonomics and vastly larger true and apparent field. This test does take a lot of doubt off my mind. I can now confidently observe with my wonderful ES eyepieces and enjoy the huge fields with crisp wall-to-wall stars without speculating that I might see more, if I used an excellent minimum-element eyepiece.

Oh, and the Zeiss ortho is from one of the latest series and has Zeiss T-lag coatings. It was not completely pristinely clean, but it was not in any way greasy or dirty either. A close inspection today revealed only a few dust motes. I can (and probably will) do the test again or against other eyepieces, if there's any interest.

*

Thus tested and my worries confirmed unfounded, I continued the rest of the evening with enjoyable observations. A highlight must be the observation of clear spiral arms and several HII regions in M101 with the 12" and 8.8mm. Superb view!


Clear skies!
Thomas, Denmark


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csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: First real test of my ES 82 eyepieces new [Re: Astrojensen]
      #5659934 - 02/03/13 12:52 PM

I too, am finding the ES82 8.8mm to be one fine eyepiece. It does one fantastic job on planets in my 10XTi.

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stevew
Now I've done it


Reged: 03/03/06

Loc: British Columbia Canada
Re: First real test of my ES 82 eyepieces new [Re: Astrojensen]
      #5660201 - 02/03/13 03:28 PM Attachment (35 downloads)

Thomas, Glad to hear your enjoying your ES eyepieces.
The 8.8 mm is the next one on my list.
Strange though, every scope I have tried my 30mm in has been sharp to the edge. Everything from my 16 F-4.5 and TMB130 F-7 through to my C11.
Maybe it's just my eyes

Steve


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andrew hampton
super member


Reged: 11/01/10

Loc: Wales
Re: First real test of my ES 82 eyepieces new [Re: stevew]
      #5660228 - 02/03/13 03:48 PM

I guess the problem with the 30mm in the 72 f6 was one of field curvature - short tube refractors will generate a hugh amount. Good to read the report, thanks.

andrew


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Astrojensen
Post Laureate
*****

Reged: 10/05/08

Loc: Bornholm, Denmark
Re: First real test of my ES 82 eyepieces new [Re: andrew hampton]
      #5660263 - 02/03/13 04:07 PM

Quote:

I guess the problem with the 30mm in the 72 f6 was one of field curvature - short tube refractors will generate a hugh amount.




Yup! A refractor with a focal length of 430mm will have a focal plane curvature with a radius of around 150mm! With a field diameter of 40mm, this will mean that the edges are 1.3mm out of focus!!


Clear skies!
Thomas, Denmark


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MikeBOKC
Post Laureate
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Reged: 05/10/10

Loc: Oklahoma City, OK
Re: First real test of my ES 82 eyepieces new [Re: Astrojensen]
      #5660353 - 02/03/13 05:00 PM

I used my 30 in a new Orion xx14g f/4.6 for the scope's first light last night and was very impressed. It will likely be my go-to eyepiece in this new scope.

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dlapoint
scholastic sledgehammer


Reged: 08/18/03

Loc: Moncton NB Canada
Re: First real test of my ES 82 eyepieces new [Re: MikeBOKC]
      #5660506 - 02/03/13 06:14 PM

glad to hear they are preforming well. I have the 11 and 8.8 awaiting first light.

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GeneT
Ely Kid
*****

Reged: 11/07/08

Loc: South Texas
Re: First real test of my ES 82 eyepieces new [Re: Astrojensen]
      #5660514 - 02/03/13 06:17 PM

With the 12 Dob, did you use a Paracorr?

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GeneT
Ely Kid
*****

Reged: 11/07/08

Loc: South Texas
Re: First real test of my ES 82 eyepieces new [Re: Astrojensen]
      #5660516 - 02/03/13 06:18 PM

Nice report! I like AB comparisons.

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stevew
Now I've done it


Reged: 03/03/06

Loc: British Columbia Canada
Re: First real test of my ES 82 eyepieces new [Re: Astrojensen]
      #5660525 - 02/03/13 06:24 PM

Quote:


11mm: A superb deep-sky eyepiece on the 150mm refractor. Sharp to the edge and pleasing dark background and still lots of field for medium size objects. Equally at home on the 12" and sharp to the edge, as far as I could judge. Extremely good views of galaxies.


I tested the 11mm ES 82 against a 10mm Zeiss Jena ortho, using faint stars in and near NGC 2158 to judge the transmission. Both resolve numerous stars in NGC 2158. I could not detect a difference between them. I never found a star I could see in one that I could not in the other, with the same amount of averted vision and time. They felt so alike that apart from the huge difference in apparent and true field and ergonomics, it was near impossible to tell them apart. This is extremely remarkable, since the 10mm, given its slightly higher magnification, should have done better resolving the cluster and darkened the sky background and showed fainter stars. I saw no such clear effect. In the end, I had to declare it a draw. Or maybe I should declare the ES a clear winner, since it was showing the same as the 10mm Zeiss,
Clear skies!
Thomas, Denmark



I have been a big fan of the Meade 4000 UWA and have owned them for years. I started purchasing the ES eyepiece to compliment my old Meade's, but the ES 82* eyepieces seem to have better light transmission. I suppose it's the modern coatings and glass types.
The ES 11mm is a very sharp eyepiece, and is one of my favorites.
Very useful for globular clusters, and nebula, it also works really well as a planetary eyepiece in the proper scope.
I suppose I will have to start collecting the other focal lengths.
I'm truly amazed at the quality of the views for the money.


Steve


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Astrojensen
Post Laureate
*****

Reged: 10/05/08

Loc: Bornholm, Denmark
Re: First real test of my ES 82 eyepieces new [Re: GeneT]
      #5661090 - 02/04/13 02:50 AM

Quote:

With the 12 Dob, did you use a Paracorr?




Hi Gene

Nope, no Paracorr. And I am not in a hurry to get one. I can see the coma near the edge, but the spot sizes are still pretty small, so when I look towards the center of the field, it all looks good.

Maybe I'll get one down the road, but right now there are more important things to get.


Clear skies!
Thomas, Denmark


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Astrojensen
Post Laureate
*****

Reged: 10/05/08

Loc: Bornholm, Denmark
Re: First real test of my ES 82 eyepieces new [Re: stevew]
      #5661091 - 02/04/13 02:53 AM

Quote:

I'm truly amazed at the quality of the views for the money.




This! I continually have to pick up my jaw from the ground, every time I turn the scopes toward a new target. Just flat out incredible views!

Rolls-Royce performance for Toyota price!


Clear skies!
Thomas, Denmark


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Astrojensen
Post Laureate
*****

Reged: 10/05/08

Loc: Bornholm, Denmark
Re: First real test of my ES 82 eyepieces new [Re: GeneT]
      #5661094 - 02/04/13 02:59 AM

Quote:

Nice report! I like AB comparisons.




Me too! I think I'll try comparing the 8.8mm ES to a very late production model 9mm Kasai (Circle T) volcano top ortho or perhaps my 9mm KK 0.965" ortho, which I suspect is actually the better of the two orthos. The 18mm ES can similarly be compared to an older 18mm Circle T ortho or an 18mm KK 0.965" ortho. I can also throw in a 20mm GSO Superview in the mix, but I'm afraid it won't stand a chance.


Clear skies!
Thomas, Denmark


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Tophat3
super member


Reged: 07/20/10

Loc: Columbus,Ohio
Re: First real test of my ES 82 eyepieces new [Re: Astrojensen]
      #5661124 - 02/04/13 04:14 AM

I think it would be a good idea throwing the 20mm GSO in the mix.

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MRNUTTY
Carpal Tunnel
*****

Reged: 11/22/11

Loc: Mendon, MA
Re: First real test of my ES 82 eyepieces new [Re: Tophat3]
      #5661246 - 02/04/13 07:57 AM

I found the ES100, 82, and 68mm EP's to be excellent regardless of cost. I sincerely regret selling my 82 And 68mm sets to fund a TV series. But, it was too expensive to hold all these wide fields. The build quality was excellent, not a blemish in the bunch. The only nit I had was a faint greenish tint that showed in the 82's when during daylight when my eye was close to the blackout position.

Edited by MRNUTTY (02/04/13 04:10 PM)


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sopticals
professor emeritus


Reged: 03/28/10

Loc: New Zealand
Re: First real test of my ES 82 eyepieces new [Re: Tophat3]
      #5662320 - 02/04/13 07:08 PM

Quote:

I think it would be a good idea throwing the 20mm GSO in the mix.




I had the 30mm GSO Superview as my main wide field ocular, until my ES 82 30mm arrived. There was no contest, with wider FOV and very much sharper images to be had in the ES eyepiece, (brilliant).

Stephen.(44deg.S.)


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sslcm56
super member


Reged: 07/20/12

Loc: Montgomery, Al.
Re: First real test of my ES 82 eyepieces new [Re: sopticals]
      #5662437 - 02/04/13 08:27 PM

I am so glad that I found this little thread! I am going to order the ES 30 the 14 and the 4.7 tomorrow or the next day. I have been so NERVOUS about dropping so much money on anything that I don't know that much about. I'm glad that all here seem to like theirs so much. Does anyone have the ES barlow? I might as well get one of those also if it's worth it.

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stevew
Now I've done it


Reged: 03/03/06

Loc: British Columbia Canada
Re: First real test of my ES 82 eyepieces new [Re: MRNUTTY]
      #5662547 - 02/04/13 09:47 PM

Quote:

I found the ES100, 82, and 68mm EP's to be excellent regardless of cost.



I'd have to agree.
I tried my ES 30mm against a 31 Nagler and was hard pressed to see the difference.
The only noticeable difference was the extra $300 in my bank account.

Steve


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csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: First real test of my ES 82 eyepieces new [Re: stevew]
      #5663107 - 02/05/13 09:10 AM

Would love to find someone at the Dark Site this weekend with the waterproof ES82 30mm. I have the older, nonwaterproof style and it would be nice to see a head-to-head comparison......

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Stargaz18
sage
*****

Reged: 01/04/11

Loc: Wichita Falls, TX
Re: First real test of my ES 82 eyepieces new [Re: csrlice12]
      #5664709 - 02/06/13 06:49 AM

I've got the ES 2" barlow, ES 30, ES 24 and the ES 18. I can't say for sure being still somewhat of a newbie to this but I think the barlow is of the same quality as the EP's. I've been totally blown away with all of them in my new ES ED80. Haven't yet had a chance to try them all out in the C9.25

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