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Explore Scientific 82 deg. series 24mm Eyepiece

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#1 Olivier Biot

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Posted 15 July 2010 - 07:53 AM

CN REPORTS Product Review: Explore Scientific 82 deg. series 24mm Eyepiece

By David Knisely

#2 operascope

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Posted 15 July 2010 - 10:19 AM

It wasn't until I read your review that I realized that my 4.7mm that I purchased in March has the same twist up feature.
Thanks for the review!

#3 Darenwh

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Posted 15 July 2010 - 11:59 AM

One more excellent and very well written review from David.

Thanks David.

These eyepieces are, IMHO, excellent performers. I have the ES82 30mm and the ES82 4.7mm and other than a little glare issue (only seen on the moon) on the 4.7mm and the weight of the 30mm I really think these are nearly perfect performers for me. The 30mm is great all the way to the edge and is a great ultra low power eyepiece. The 4.7mm works just as well but at high power. I love the 4.7mm for planetary viewing in my dob (12.5" F6) and refractor (6" F8 Achro) and it does just as well on galaxy's, planetary's, globs, etc... The 30mm makes me feel like I could fall in it as I cruise along the Milkyway. The number of galaxy's it showed me in the Virgo cluster is sublime.

I love the products that Explore Scientific has brought us and would love to get their 5" Apo sometime in the near future. It seems like you just cannot go wrong with their products.

#4 David Knisely

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Posted 15 July 2010 - 01:09 PM

It appears that Explore Scientific is in the process of getting rid of that bulky mechanical eye cup in their latest version of the eyepiece (a "nitrogen-purged" waterproof eyepiece), so maybe the "old" version will be discounted soon. Clear skies to you.

#5 Darenwh

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Posted 15 July 2010 - 07:39 PM

It would be great as I would have to consider getting one or two but as they seem to be out of stock just about every where I don't think we will see many on the chopping block.

#6 Arizona-Ken

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Posted 15 July 2010 - 09:00 PM

David:

Enjoyed your review as always. Good information, clearly written. Thank you.

Arizona Ken

#7 great_bear

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Posted 21 July 2010 - 04:00 AM

Love that big serial number printed on the side.

- makes it look like you're getting something special for your money...

#8 Mogster

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Posted 28 July 2010 - 03:32 PM

The ES 24 looks very wide at the top, I'm really not keen on that in my ep's.

Maybe I have an odd shaped face or something but I don't want the edge of the housing pressing on my face. My Hyperion 8 is like that, after using my LV's and plossls I have to position my head in a certain way to avoid contact with the wide(ish)housing with the rubber covered threaded ring.

#9 rockethead26

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Posted 28 July 2010 - 03:35 PM

The ES 24 looks very wide at the top, I'm really not keen on that in my ep's.


The new version of the ES 82º EPs address this common complaint. They should be out in a month or two.

#10 MingoT

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Posted 13 September 2010 - 05:34 AM

Thanks David, very interesting review!

I have a couple of questions:
- Apart from less pincushion, how does the view of the ES compare with the Panoptic 24mm?
- How well do they perform without Paracorr at f/5?

Thanks,
Mingo

#11 David Knisely

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Posted 13 September 2010 - 09:39 AM

Thanks David, very interesting review!

I have a couple of questions:
- Apart from less pincushion, how does the view of the ES compare with the Panoptic 24mm?
- How well do they perform without Paracorr at f/5?

Thanks,
Mingo


The 24mm ES has so much more apparent field of view than my 24mm Pantopic that it would be difficult (and maybe a little unfair) to compare the two. The 24 ES has a bit less distortion but maybe slightly more astigmatism and lateral color at the field edges than the 24mm Pan. Both are great eyepieces. As far as the Paracorr is concerned, that just eliminated the coma of the telescope, which was quite visible in both eyepieces (more in the 24 ES due to its significantly larger field of view). They still performed well, but unlike with some eyepieces that have their astigmatism overwhelm the coma, these two had little and really showed how the Paracorr really eliminated the coma in the f/5 Newtonian. Clear skies to you.

#12 bgavin

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Posted 03 March 2011 - 04:26 PM

One thing I noted in the review was the "haunted" comment.
It will be interesting to see if ES corrects this problem with the newly release ES/N2 model.

#13 Achernar

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Posted 01 July 2012 - 02:56 PM

I have to agree with this review, the 24mm 82 degree ES eyepiece is a very good eyepiece indeed. I never noticed much if any field curvature and stars are pinpoints just about all the way to the edge. I have the newer nitrogen purged model, and strangely enough without my glasses I still get pinpoint stars when I position my eye in the right spot, despite my astigmatism. For the money, it's a tremendous value and I have no regrets buying mine.

Taras

#14 csrlice12

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Posted 05 July 2012 - 11:01 AM

CN REPORTS Product Review: Explore Scientific 82 deg. series 24mm Eyepiece

By David Knisely


I have one of the older 2" 24mm ES 82s (nonwaterproof, serial # 73) Does anybody know how many eyepieces ES made of each of these by mm and series? I've looked and can't find anything. I do love the eyepiece. Yes, it's big, it's heavy, but looking thru it is well worth it.






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