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Equipment Discussions >> Eyepieces

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Astrojensen
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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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csrlice12
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Reged: 05/22/12

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Re: First real test of my ES 82 eyepieces new [Re: Stargaz18]
      #5664767 - 02/06/13 08:05 AM

"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."

Didn't your mama tell you you'll go blind doing that?


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Achernar
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Reged: 02/25/06

Loc: Mobile, Alabama, USA
Re: First real test of my ES 82 eyepieces new [Re: sslcm56]
      #5664829 - 02/06/13 09:05 AM

You'll be very happy with these eyepieces, but if you don't have a coma corrector, I suggest considering getting one. Chances are there's a local astronomy club near you who has members that have one you can try out in person. Yes, they can be expensive but I picked up a Paracorr for $150.00 used in good shape. Coma is quite noticeable at F/5 and below, and the huge apparent field of view will mean stars will be tiny comets across much of the field. I use Paracorrs in my 10 and 15-inch Dobs, and with the ES 82 degree eyepieces I get pinpoint stars right across the field. That results in fantastic views of objects such as the Pleiades and Double Cluster.

Taras


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russell23
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Reged: 05/31/09

Loc: Upstate NY
Re: First real test of my ES 82 eyepieces new [Re: sslcm56]
      #5665197 - 02/06/13 12:52 PM

Quote:

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.




I have a 1.25" 2x ES barlow that I purchased in January. I've only had 2 chances to use it - a night with really lousy seeing conditions and a 2nd night that was pretty good seeing conditions.

Based upon the limited opportunity on that second night I think the ES 2x barlow is probably excellent. However, if the hourly forecast holds up I will have some clear skies this evening and will get back to you with specifics.

Dave


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csrlice12
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Loc: Denver, CO
Re: First real test of my ES 82 eyepieces new [Re: russell23]
      #5665235 - 02/06/13 01:13 PM

I truthfully don't use my barlows anymore, preferring fixed f/l eyepieces. Not that I won't ever use it, but just don't anymore (maybe on that one night in a lifetime where you see the stacked barlow pics). That being said, everyone should have a 2X barlow in their kit. Truth be told, barlows are pretty basic optical technology, and the GSO barlow will perform as well as any and also allows you to take off the bottom of the barlow and put in on your eyepiece and it acts like a 1.5X barlow...down the road though, as you collect more eyepieces (and who doesn't along the way), you'll probably find you use it less and less. I'd probalbly save a few $$ and go with the GSO barlow.

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Scanning4Comets
Markus
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Reged: 12/26/04

Loc: Ontario, Canada
Re: First real test of my ES 82 eyepieces new [Re: csrlice12]
      #5665490 - 02/06/13 03:19 PM

Quote:

I truthfully don't use my barlows anymore, preferring fixed f/l eyepieces. Not that I won't ever use it, but just don't anymore (maybe on that one night in a lifetime where you see the stacked barlow pics). That being said, everyone should have a 2X barlow in their kit. Truth be told, barlows are pretty basic optical technology, and the GSO barlow will perform as well as any and also allows you to take off the bottom of the barlow and put in on your eyepiece and it acts like a 1.5X barlow...down the road though, as you collect more eyepieces (and who doesn't along the way), you'll probably find you use it less and less. I'd probalbly save a few $$ and go with the GSO barlow.




Very valid points made here! I have been exactly the same in this regard to barlows. I've used them, got rid of them, (even more than my eyepieces believe it or not, lol), and I find that fixed FL eyepieces really do a lot better, especially when deep sky observing and needing more power because you only have so much time before the dim object in your sights drifts away from the field if you use a non-driven mount.

When it comes to planets, I will use a barlow any time because the object is bright and you can always find it again if it drifts from the view.

I've owned both the 2" GSO and 2" Antares barlows and can't see any difference in views from each. Just last night I saw a new barlow made by Antares: it has a 2" Twist Lock built right on it and is threaded for 2" filters!

Antares 2" 1.6x Barlow Lens with Twist Lock


Cheers,

Edited by Scanning4Comets (02/06/13 03:23 PM)


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Astrojensen
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Reged: 10/05/08

Loc: Bornholm, Denmark
Re: First real test of my ES 82 eyepieces new [Re: Scanning4Comets]
      #5665586 - 02/06/13 04:14 PM

I'm using barlows more than ever before. Mostly because I use a binoviewer a lot. Some eyepieces just barlow a heck of a lot better than others. Some plössls, more than other eyepieces I've tried, are awful in a barlow, for some strange reason. My 25mm Zeiss microscope eyepieces barlow extremely well and will take a ridiculously huge amount of barlowing without ill effects. My ES 82 eyepieces also barlow extremely well.

I find that today I strongly prefer an eyepiece with long focal length and generous eye relief over an eyepiece with short native focal length. Remember, the ES 82 eyepieces all have a built-in barlow element (often referred to as a Smyth lens). I count that as using a barlow. My 8.8mm ES 82 has roughly the same eye relief and comfort of my barlowed 17mm plössl (but a much larger field, of course).


Clear skies!
Thomas, Denmark


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Starman81
Carpal Tunnel
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Reged: 03/06/08

Loc: Metro Detroit, MI, USA
Re: First real test of my ES 82 eyepieces new [Re: Scanning4Comets]
      #5665741 - 02/06/13 05:55 PM

Quote:

Quote:

I truthfully don't use my barlows anymore, preferring fixed f/l eyepieces. Not that I won't ever use it, but just don't anymore (maybe on that one night in a lifetime where you see the stacked barlow pics). That being said, everyone should have a 2X barlow in their kit. Truth be told, barlows are pretty basic optical technology, and the GSO barlow will perform as well as any and also allows you to take off the bottom of the barlow and put in on your eyepiece and it acts like a 1.5X barlow...down the road though, as you collect more eyepieces (and who doesn't along the way), you'll probably find you use it less and less. I'd probalbly save a few $$ and go with the GSO barlow.




Very valid points made here! I have been exactly the same in this regard to barlows. I've used them, got rid of them, (even more than my eyepieces believe it or not, lol), and I find that fixed FL eyepieces really do a lot better, especially when deep sky observing and needing more power because you only have so much time before the dim object in your sights drifts away from the field if you use a non-driven mount.

When it comes to planets, I will use a barlow any time because the object is bright and you can always find it again if it drifts from the view.

I've owned both the 2" GSO and 2" Antares barlows and can't see any difference in views from each. Just last night I saw a new barlow made by Antares: it has a 2" Twist Lock built right on it and is threaded for 2" filters!

Antares 2" 1.6x Barlow Lens with Twist Lock


Cheers,




Nice find--the new and improved Antares 1.6x 2" barlow looks great! They skipped the compression ring and opted for the twist-lock mechanism, interesting. And finally now with the 2" filter threads and the price is very reasonable. I think I just sold myself on one.


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: First real test of my ES 82 eyepieces new [Re: Starman81]
      #5665953 - 02/06/13 08:15 PM

Uh, guys, did you read the last line of that ad:

"Please note: A couple of tiny dust particles between lens elements, uneven lens edge blackening, very minor coating blemishes, or even a very small fine lens scratch or two are very common in this Antares product and must be accepted as normal. However, these will not impact optical performance."


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Scanning4Comets
Markus
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Reged: 12/26/04

Loc: Ontario, Canada
Re: First real test of my ES 82 eyepieces new [Re: csrlice12]
      #5666088 - 02/06/13 09:50 PM

Quote:

Uh, guys, did you read the last line of that ad:

"Please note: A couple of tiny dust particles between lens elements, uneven lens edge blackening, very minor coating blemishes, or even a very small fine lens scratch or two are very common in this Antares product and must be accepted as normal. However, these will not impact optical performance."




Yea, I saw that. Not a huge deal really since it is only $95.00. If I ever get another one, this will the one for me too!

Cheers,


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csrlice12
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Re: First real test of my ES 82 eyepieces new [Re: Scanning4Comets]
      #5666629 - 02/07/13 08:30 AM

Nah, I'll spend $50 for a barlow with good optics instead.....

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russell23
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Reged: 05/31/09

Loc: Upstate NY
Re: First real test of my ES 82 eyepieces new [Re: russell23]
      #5666798 - 02/07/13 10:28 AM

Quote:

Quote:

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.




I have a 1.25" 2x ES barlow that I purchased in January. I've only had 2 chances to use it - a night with really lousy seeing conditions and a 2nd night that was pretty good seeing conditions.

Based upon the limited opportunity on that second night I think the ES 2x barlow is probably excellent. However, if the hourly forecast holds up I will have some clear skies this evening and will get back to you with specifics.

Dave




Well I did get a chance to use the 2x ES barlow last night - and the sky conditions were the best I've seen in several months. The ES barlow really does a nice job. It works like a TV Powermate. I used it with my 30mm and 17mm silvertops, 15mm Paradigm, 12.8mm Zeiss, 20mm XW, and 16mm Flat field eyepiece.

What I can tell you is that with all of those eyepieces it performed extremely well. It maintained the exit pupl characteristics of the eyepiece while sharpening the edge performance. It did not introduce any annoying light effects at the edge of the field (brightening, distortion, scatter) as some cheap barlows will do.

I could not find any fault with the ES 2x barlow and I love the construction. The locking screw is nice and large and east to tighten/loosen with gloves on.

I actually found that the ES 2x barlow performed better than a 2.5x Powermate with some eyepieces - the 20mm XW in particular.

Dave


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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: russell23]
      #5667932 - 02/07/13 09:57 PM

Thanks Dave....I ordered the 30mm the 6.7mm and the 2" 2X barlow with 1.25 adapter. Now it's just a waiting game till Astronomics gets them in. Of course the clouds will part and the sky will be crystal clear until the day I get them!

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PolarBearCO
member


Reged: 01/25/13

Re: First real test of my ES 82 eyepieces new [Re: sslcm56]
      #5672481 - 02/10/13 02:37 PM

Quote:

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.




Where did you order from? I can't find anyone that has them in stock. Well, I haven't looked at Adorama or Hayneedle because their prices don't reflect the currect sale prices.

I have the ES 82 11 and 18 and want to grab the 6.7 but can't find it in stock. Most places don't seem to allow backorders. I can order it from ES directly, but their site doesn't say whether it's in stock or just an order.


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Astrojensen
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Re: First real test of my ES 82 eyepieces new [Re: PolarBearCO]
      #5672508 - 02/10/13 02:47 PM

The ES 6.7 seems to be sold out friggin' everywhere! Also in Europe.


Clear skies!
Thomas, Denmark


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csrlice12
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Re: First real test of my ES 82 eyepieces new [Re: Astrojensen]
      #5672520 - 02/10/13 02:56 PM

a fresh batch of new eyepiece material is being whipped up in the middle of a star going nova anytime now..........

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Astrojensen
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Re: First real test of my ES 82 eyepieces new [Re: csrlice12]
      #5672554 - 02/10/13 03:18 PM

According to the homepage, where I get my ES eyepieces, the star is about to go boom sometime around mid-march, showering us with 6.7mm's.

And a supernova is going off in early may, it seems, for that is the scheduled day of arrival for the ES100 5.5mm!


Clear skies!
Thomas, Denmark


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rgm40
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Re: First real test of my ES 82 eyepieces new [Re: Astrojensen]
      #5672651 - 02/10/13 04:33 PM

Has anyone else experienced what appears like vignetting around the FOV of your ES82s? I am not an expert on why vignetting occurs although I am fully aware that secondary mirror sizing comes to play. I have noticed this with my ES 82s whereas I do not notice this with 68 degree fields or with 2" eyepieces; at least, not to a significantly noticeable degree.

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Astrojensen
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Re: First real test of my ES 82 eyepieces new [Re: rgm40]
      #5672693 - 02/10/13 04:56 PM

I haven't noticed any such thing. Could you elaborate on how it looks and what scope you have?


Clear skies!
Thomas, Denmark


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Achernar
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Re: First real test of my ES 82 eyepieces new [Re: rgm40]
      #5672700 - 02/10/13 05:03 PM

I haven't noticed any vignetting with mine, in any of my three telescopes.

Taras


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rgm40
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Re: First real test of my ES 82 eyepieces new [Re: Achernar]
      #5672724 - 02/10/13 05:26 PM

10 inch f/7.55 with 1.58 secondary mirror. Views are excellent. I just notice a fall-off in brightness around the outer third when using the 82 degree ES eyepieces. I do not have any other 82 degree eyepieces to compare. With my setup, the 1.58 secondary is on the upper end of the sizing spectrum according to NEWT but is supposed to be in the error free zone.

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sslcm56
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Re: First real test of my ES 82 eyepieces new [Re: PolarBearCO]
      #5673123 - 02/10/13 09:38 PM

Well, since everyone in the world is out I just went ahead and ordered from Astronomics. I mean HEY, they give us a discount, they keep CN up and running, and they talked me out of spending almost 400.00 that I would have spent due to ignorance and inexperience.
With servise like that I can wait. It don't mean that I want to tho...


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leviathan
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Re: First real test of my ES 82 eyepieces new [Re: rgm40]
      #5673343 - 02/11/13 12:09 AM

Quote:

10 inch f/7.55 with 1.58 secondary mirror. Views are excellent. I just notice a fall-off in brightness around the outer third when using the 82 degree ES eyepieces. I do not have any other 82 degree eyepieces to compare. With my setup, the 1.58 secondary is on the upper end of the sizing spectrum according to NEWT but is supposed to be in the error free zone.



Maybe this is due to small secondary ?


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csrlice12
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Re: First real test of my ES 82 eyepieces new [Re: rgm40]
      #5673625 - 02/11/13 08:36 AM

None here on either scope.

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csa/montana
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Re: First real test of my ES 82 eyepieces new [Re: sslcm56]
      #5673794 - 02/11/13 10:36 AM

Quote:

Well, since everyone in the world is out I just went ahead and ordered from Astronomics. I mean HEY, they give us a discount, they keep CN up and running, and they talked me out of spending almost 400.00 that I would have spent due to ignorance and inexperience.
With servise like that I can wait. It don't mean that I want to tho...






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PolarBearCO
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Re: First real test of my ES 82 eyepieces new [Re: sslcm56]
      #5673918 - 02/11/13 11:52 AM

Quote:

Well, since everyone in the world is out I just went ahead and ordered from Astronomics. I mean HEY, they give us a discount, they keep CN up and running...




Thanks. Just placed an order with them for the backordered 4.7 and 6.7mm EPs. I knew about the discount, but wanted to originally buy just one EP, so I wasn't going to get free shipping. I didn't realize they operated CN, so I went ahead and ordered a 2nd EP to support them.



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