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thetortoise
super member
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Reged: 07/25/12

Loc: Longmont, CO
Re: Explore Scientific 25mm 100 degree eyepiece new [Re: davidpitre]
      #5993232 - 07/27/13 04:05 PM

Such an interesting review that articulates what I don't have the experience to articulate myself! In short, I struggle with the 25mm - I thought for sure this would be an easy replacement for the ES30 82*, but here I am months later and I can't bring myself to sell the 30 (or the 25) but know that one of them "should" go for practical reasons.

Not that much I can add but to confirm this EP really is a nightmare on the moon (I do like to look at the moon wide-field occasionally) with a bright orange ring all the way around. I struggle somewhat with eye-placement as well, black-outs are common as I try to scan the sky - not excessive but it certainly detracts from the immersion experience. I do also find the light scatter to be excessive.

Finding a spot to focus well off-center does seem to create a nice balanced pleasing view, and it's nice to have the extra magnification in such a wide-field when compared to the pinpoint tighter view of the 30mm. Maybe one more night with this review in mind and I can finally come to a conclusion on whether to keep or let someone else try the 25mm...


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TechPan6415
sage
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Reged: 07/29/12

Loc: Aspen, Co
Re: Explore Scientific 25mm 100 degree eyepiece new [Re: davidpitre]
      #5993486 - 07/27/13 07:17 PM

I like it a lot for all the reasons I bought it for, low surface brightness large dso's, wide field low power sweeps and a more workable exit pupil.

I also saw the orange on the moon but thankfully won't be using it for that instead opting for binoviewing.

It's not a one size fits all world, it's best to buy eyepieces based on specific needs rather than over enthusiastic consensus in my opinion....

I have since sold my ES 30, another great eyepiece...


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thetortoise
super member
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Reged: 07/25/12

Loc: Longmont, CO
Re: Explore Scientific 25mm 100 degree eyepiece new [Re: TechPan6415]
      #5993834 - 07/27/13 10:55 PM

Wide field low power sweeps are one of my favorite things. The exit pupil problem does not seem to affect me yet with the 30mm as far as I can tell, though something to consider for the future. My specific need is just the most pleasing subjective aesthetic experience of observing - as of yet I have been unable to determine which of the two EP's "wins" in that regard for me, even after months of observing with each. I'm certainly not looking for an external "consensus" to decide what my best subjective experience is, though reading what the specific phenomena I am experiencing with the EP's are actually called does certainly help with the assessment. After using the 20mm 100 I thought for sure the 25mm would be another "no contest" against the 30mm but it hasn't worked out that way which is disappointing only from a tough decision perspective (there are certainly worse problems in life than having two excellent EP's!). I agree these are two great EP's, which is better? Each observer has to decide for himself. Something I will either do, or, will continue to hold onto both because I just can't decide.

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JimMo
I'd Rather Do It Myself


Reged: 01/08/07

Loc: Under the SE Michigan lightdom...
Re: Explore Scientific 25mm 100 degree eyepiece new [Re: JimMo]
      #6090696 - 09/19/13 09:51 PM

As an update to my previous post I ended up selling the ES25/100 for many of the same reasons that the OP and Don P. had. I tried to like it, but the views through my 21 Ethos showed that hands down it a much better eyepiece, although the f/l is different as is the exit pupil. I traded a Nagler 31 for the ES 25 and don't know if I'll try to replace it. Didn't use the 31 as much the 21 Ethos and higher mag eyepieces, but maybe if I had a 22" or larger reflector I could see needing a wider field, but where I'm at in aperture I don't miss either of them at all.

Cheers,


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Scott in NCAdministrator
80mm Refractor Fanatic
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Reged: 03/05/05

Loc: NC
Re: Explore Scientific 25mm 100 degree eyepiece new [Re: JimMo]
      #6090756 - 09/19/13 10:17 PM

Thanks for the review, Richard. I really like my ES100 20mm eyepiece, but now I'm pretty sure that that's as wide as I'll go. Not that I was in the market for a *new* ES100 25mm, especially at that price, but if a gently used one had ever come up on the used market at a nice price, well, you never know...

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TechPan6415
sage
*****

Reged: 07/29/12

Loc: Aspen, Co
Re: Explore Scientific 25mm 100 degree eyepiece new [Re: davidpitre]
      #6113597 - 10/02/13 05:22 PM

Update, I continue to be really amazed by this eyepiece, especially with nebula filters under our super dark skies. Objects like the Veil, N. American and M42 are just spectacular in using it.

The ES 25mm 100 is now my second most used eyepiece, the 14mm version is the most used. Overall, a pretty amazing gain over my 30mm 82 degree.


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opticsguy
sage


Reged: 02/02/09

Loc: Washington State
Re: Explore Scientific 25mm 100 degree eyepiece new [Re: TechPan6415]
      #6124233 - 10/08/13 07:30 AM

Interesting reviews and comments about this eyepiece. My impression is most users here are using fast scopes f/5 and under. How is this eyepiece performing on long focus refractors? would be curious to try on my 8" f/13. I suspect a lot of the complaints might disappear???

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csrlice12
Postmaster
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Reged: 05/22/12

Loc: Denver, CO
Re: Explore Scientific 25mm 100 degree eyepiece new [Re: opticsguy]
      #6124920 - 10/08/13 01:15 PM

+1 on the ES 14 100*, this is the one of the line where it all came together right...a fantastic widefield. The 20mm is good, I'm using it more and more, but I just don't see me ever giving up my mushroom top ES 82 24mm...now if the 9mm will ever get here...

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csa/montana
Den Mama
*****

Reged: 05/14/05

Loc: montana
Re: Explore Scientific 25mm 100 degree eyepiece [Re: davidpitre]
      #6130771 - 10/11/13 10:54 AM

Quote:

Quote:

Bashing ES and Scott Roberts - who I have met and who is not only a gentleman but a true innovator - is just off the mark. Hopefully, this competition will spur more innovation and even better prices all around.

Clears,



Agreed. I have seen and heard nothing but good from Mr Roberts. Like the eyepieces or not, I think we should be respectful.




+1


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