Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> Eyepieces

Pages: 1
John Huntley
scholastic sledgehammer
*****

Reged: 07/16/06

Loc: South West England
Explore Scientific 20mm 100 vs Nagler T5 20mm
      #5739843 - 03/17/13 11:35 PM

I've owned the Nagler T5 20mm for some time but out of curiosity as much as anything (it's my 1st ES eyepiece) I obtained a 20mm 100 ES to try.

I was expecting the 20mm Nagler to deliver more satisfying views, darker sky, slightly more contrast on DSO's etc but my first couple of sessions with these two have not been so conclusive.

My impression so far is that the ES 20 / 100 matches the Nagler T5 20mm in terms of contrast and light throughput on DSO's and shows stars pretty sharply across the whole field of view with my fastest scope, an F/5.3 12" dobsonian.

The additional eye relief, wide field and more immersive view of the ES 20 / 100 are winning me over, rather to my surprise.

Am I missing something here ?

Perhaps my scopes are not fast enough to allow the Nagler to show it's edge ?

I'm wondering if anyone else has compared these two and what are your views on their relative performance if you would care to share them ?

Thanks


Post Extras: Print Post   Remind Me!   Notify Moderator  
herrointment
Post Laureate
*****

Reged: 03/12/11

Loc: North of Hwy. 64
Re: Explore Scientific 20mm 100 vs Nagler T5 20mm new [Re: John Huntley]
      #5740011 - 03/18/13 02:42 AM

I have not compared the two but I can say having recently sold the ES 20mm 100 due to a cash flow condition that in a few weeks I'm ordering a new one. A fine EP and reasonably priced for what it delivers.

Post Extras: Print Post   Remind Me!   Notify Moderator  
stratocaster
sage
*****

Reged: 10/27/11

Re: Explore Scientific 20mm 100 vs Nagler T5 20mm new [Re: herrointment]
      #5740021 - 03/18/13 02:51 AM

I replaced my Nagler 12T4 with an ES 9mm 100. I liked the 12T4 a lot, but the ES 9mm 100 gives me a more optimal exit pupil size - and therefore a darker background, a wider afov, about the same tfov, less critical eye placement, and great views. I don't view with glasses, so the shorter eye relief is not an issue. No regrets here.

Post Extras: Print Post   Remind Me!   Notify Moderator  
junomike
Carpal Tunnel
*****

Reged: 09/07/09

Loc: Ontario
Re: Explore Scientific 20mm 100 vs Nagler T5 20mm new [Re: John Huntley]
      #5740487 - 03/18/13 11:14 AM

I went down a similar road when I picked up my first ES 100°.
Up until that point I was a 17T4 advocate. The 14 ES 100° not only met the 17T4 in transmission, but offered a higher magnification at the same FOV and lacked that finicky T4 eyeplacement!

It wasn't long before my 20T2 was ousted by the 20 ES 100°. Again, the ES showed It could run with the TV and offered noticeably better transmission.

I will say that the 20T2 does have a "legendary" feel to It and It's one of a few eyepieces that can be used in a fast Dob (F4.5) without a Paracorr and have near perfect edges.

Mike


Post Extras: Print Post   Remind Me!   Notify Moderator  
Sean Puett
Carpal Tunnel
*****

Reged: 09/06/10

Loc: always cloudy, washington
Re: Explore Scientific 20mm 100 vs Nagler T5 20mm new [Re: junomike]
      #5740543 - 03/18/13 11:43 AM

I am surprised at this outcome. I really like ES eyepieces, just for some background info. But, I think the nagler 20 is one of the best eyepieces I have used. That is a huge endorsement for the 20mm ES100 to me.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Tank
Carpal Tunnel
*****

Reged: 07/27/09

Loc: Stoney Creek, Ontario, CANADA
Re: Explore Scientific 20mm 100 vs Nagler T5 20mm new [Re: Sean Puett]
      #5740700 - 03/18/13 01:16 PM

Done the 20 ES 100 vs the 20T2 Nagler.
Good seeing night in a 10" DOB 4.7 and a 111 APO F7.7
I found they were more similar than different
20T2 had better color saturation
20T2 had better ablitly to show the whole FOV at once
20T2 had a bit more pop/sharp to the image
20 ES 100 more immersive
20 ES hair better transmission
20 ES larger FOV
20 ES lighter

Bottom line for me was there is no need to swap and get the 20 ES if i have the 20T2 and also the other way around.
The 20ES is a great EP!


Post Extras: Print Post   Remind Me!   Notify Moderator  
junomike
Carpal Tunnel
*****

Reged: 09/07/09

Loc: Ontario
Re: Explore Scientific 20mm 100 vs Nagler T5 20mm new [Re: Sean Puett]
      #5740759 - 03/18/13 01:48 PM

Quote:

I am surprised at this outcome. I really like ES eyepieces, just for some background info. But, I think the nagler 20 is one of the best eyepieces I have used. That is a huge endorsement for the 20mm ES100 to me.




Sean, Just to be clear, Tony (Tank) and I are referring to the older 20T2. The newer 20T5 is rumored to have better (newer) coatings and transmission which changes the game for me as that was a big part of my decision.

Also, I don't use Dobs so the edge correction wasn't as critical for me. If I did though, I probably would have kept the 20T2 like Tony (Tank) did.

Mike


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1


Extra information
25 registered and 42 anonymous users are browsing this forum.

Moderator:  ausastronomer, droid, Scott in NC 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 618

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics