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How many 20mm T2s are still in use

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#1 droid

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Posted 25 March 2020 - 06:45 AM

My gf was looking through the  eyepiece collection thread. And says " you know that 20mm T2 you brag about, well not very many have one listed "

 

She also noted that , that thread , started in 2011

 

So out of curiosity we both jointly decided to see if anyone still actually has or uses one still, currently.

 

I have all 3 of the type 2 Naglers, all are residence in my first sting ep case..

 

 

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#2 lee14

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Posted 25 March 2020 - 07:02 AM

Still have the 20, although it gets less use than some others. The 12 and 9 type 2's get used more often, and the 32mm Widefield is the default 'first' one in the scope. 

 

Lee


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#3 Jon Isaacs

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Posted 25 March 2020 - 07:07 AM

Andy:

 

The 20mm Type 2 was a staple in my eyepiece case for a number of years.  It then played musical chairs with a 20mm Explore Scientific 100 degree. The Nagler was better up to 82 degrees, the ES went to 100 degrees but with less sharpness. That lasted about 3 years or so. 

 

Then a 21mm Ethos hit the scene a couple of years ago and now that 20mm type 2 is in the hands of another Cloudy Nights member Norme.  

 

Jon


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#4 droid

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Posted 25 March 2020 - 07:21 AM

Still have the 20, although it gets less use than some others. The 12 and 9 type 2's get used more often, and the 32mm Widefield is the default 'first' one in the scope. 

 

Lee

12 and 16mm T2s


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#5 macdonjh

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Posted 25 March 2020 - 07:35 AM

I've never had a Type 2 Nagler.

 

I had a N9T1 for a while, but sold it to purchase a N9T6 when I decided the view was just as good and the T6 is smaller and lighter.

 

I have a N13T1 smoothie, and coincidentally used it briefly a couple of nights ago (briefly due to clouds, not the eye piece).  I keep it mostly for nostalgia, I have a T6 in my main eye piece set.

 

Perhaps start a "20mm Type 2 Registry" thread...


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#6 Neptune

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Posted 25 March 2020 - 08:05 AM

Yeah, I break this set out and use it fairly regularly...

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#7 TOMDEY

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Posted 25 March 2020 - 08:20 AM

Yeah, I sold one to a friend for cheap and still have one that I use. Magnificent eyepiece! I even measured its coatings. The newer TeleVue eyepieces have higher throughput than the old vintage ones, with Single Surface Reflectivities around 0.6% and throughputs around 94%.   Tom

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#8 droid

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Posted 25 March 2020 - 10:50 AM

Yeah, I break this set out and use it fairly regularly...

I have the same set, accept I have the 30mm ES



#9 Neptune

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Posted 25 March 2020 - 12:39 PM

I have the same set, accept I have the 30mm ES

I had the 31mm Nagler and the 30mm ES in a head to head one night a few years ago. I feel the 31mm just edged out the 30mm. Is the Nagler worth about twice much as ES, only you can decide. I had the extra cash at the time so the ES was sold off.


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#10 evan9162

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Posted 25 March 2020 - 05:40 PM

I still have my 20T2.  It was my first ultra-wide, and my first Nagler.  Still a fantastic eyepiece.  It's the best value of all TV eyepieces in terms of lbs/$.

 

 

I also have the 12T2, and it's a ridiculously sharp eyepiece.  On a variety of targets, it performs nearly as well as a 12.5mm KK Ortho.  I kept it and sold off the Orthos...


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#11 dave brock

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Posted 25 March 2020 - 07:05 PM

I have a 16mm type 2. Was my most used eyepiece for years. A Meade Series 4000 UWA 14mm

gets more use now though. Easier viewing with glasses.



#12 Jon Isaacs

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Posted 26 March 2020 - 05:48 AM

I still have my 20T2.  It was my first ultra-wide, and my first Nagler.  Still a fantastic eyepiece.  It's the best value of all TV eyepieces in terms of lbs/$.

 

 

I also have the 12T2, and it's a ridiculously sharp eyepiece.  On a variety of targets, it performs nearly as well as a 12.5mm KK Ortho.  I kept it and sold off the Orthos...

For a number of years my best mid range eyepieces were the 20mm, 16mm, and 12mm Type 2's sandwiched between the 31mm Nagler and the 9mm Type 6.  I like the spacing, close enough for planetary in my biggest scope and close enough for teasing out galaxies.

 

But then I fell pray to the 100 degree AFoV thing and the step sizes I had were just too wide, particularly between the 13mm Ethos and the 8mm Ethos, I really need to get the 10 but I am reluctant to spend $450.  So what I have done:

 

I had previously purchased a 16mm Type 5 from Tom T.  That replaced the 16mm Type 2,.  But the step between the 13mm and the 8mm was too big so I bought an 11mm Type 6 to fill the gap.  And then the 13mm Ethos has an extender so it's 2 inch only and it's more or less parfocal with the 31mm N, the 21mm Ethos so that's great but it doesn't fit with the 16mm Type 5 and the type 6's so I ended up buying a 13mm Type 6. 

 

The 100 degree eyepieces are very nice but life was much simpler with the the three Type 2s.  Now I end up getting them all out instead of just three.    

 

The 12mm is a special eyepiece, the 20mm is a special eyepiece, my 16mm was plenty sharp and a very good eyepiece but it didn't have the "sparkle" of the 12mm.   

 

I had the for several years, 14mm Meade Series 4000 UWA. It has that giant 36mm eye lens so it's got a lot of eye relief and it's a very expansive view but I couldn't get over the among of EoFB I saw.

 

Jon



#13 droid

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Posted 26 March 2020 - 06:37 AM

Yeah, I break this set out and use it fairly regularly...

heres mine with the 35 making a special appearance

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#14 junomike

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Posted 26 March 2020 - 07:11 AM

Looks like there's several still in use.

I personally fell prey to the newer 100° offerings with better transmission but for those who don't

prefer a Coma Corrector, the 20T2 is one EP that should be considered.



#15 Miranda2525

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Posted 26 March 2020 - 07:53 AM

Looks like there's several still in use.

I personally fell prey to the newer 100° offerings with better transmission but for those who don't

prefer a Coma Corrector, the 20T2 is one EP that should be considered.

While correction is really good on the 20mm T2, eye relief is very limited. I was not a big fan of the 20mm T2 due to this issue, and the weight was astronomical. (Pun intended, lol).



#16 jack45

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Posted 26 March 2020 - 08:20 AM

I still use the 20mm T2, 12mm T2, and the 9mm T2. Looking to buy the 16mm T2, hard to find that one.

 

Clear Skies!



#17 junomike

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Posted 26 March 2020 - 12:20 PM

While correction is really good on the 20mm T2, eye relief is very limited. I was not a big fan of the 20mm T2 due to this issue, and the weight was astronomical. (Pun intended, lol).

Ah, good to know as I don't suffer from ER issues.  The weight as I recall was similar  a bit more than the 31T5 and ES 20mm 100 (that replaced it).



#18 Miranda2525

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Posted 26 March 2020 - 12:45 PM

Ah, good to know as I don't suffer from ER issues.  The weight as I recall was similar  a bit more than the 31T5 and ES 20mm 100 (that replaced it).

I find that the top element fogs up in colder weather when the warm eye gets in there. That's not an ER issue.



#19 junomike

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Posted 26 March 2020 - 04:48 PM

I find that the top element fogs up in colder weather when the warm eye gets in there. That's not an ER issue.

Good point. IME a common issue which sometimes necessitates the need for 1.25" & 2" eyepiece Dew Heaters.



#20 sopticals

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Posted 26 March 2020 - 10:36 PM

Won't be quitting my 20mm T2 . Great next step down from my 31mmT5. Thanks Uncle Albow.gif

 

Stephen (45deg.S.)


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#21 Astro-Master

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Posted 26 March 2020 - 11:56 PM

I still have my 20mm T2, It was a 25th wedding anniversary from my wife, and my first Nagler.  I still use it for wide field views of the Milky way.

 

Last year was my 50th anniversary and I got a 13 Ethos, needles to say, I'll be keeping both till death do us part.


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#22 dhferguson

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Posted 27 March 2020 - 12:45 AM

Cheers,

 

Count me a dinosaur! I still have and heavily use both the 20mm Nagler T2 and the 7mm Nagler T1. I also still have the 13mm Nagler T1, although I generally use my new 10mm Ethos instead as they yield about the same FOV. My son will get the 13mm T1 soon enough. OK, comments about the 20mm T2:

--(1) very sharp edge to edge with a Paracorr 2 and an f/4.3 Dobsonian. Equally sharp too with my other scopes of longer f/ratio,

--(2) there are certain objects that are best framed with the 20mm T2. However, I now use a 30mm ES 82 for centering objects in the FOV, then generally change right to the 10mm Ethos,

--(3) the throughput of the 20mm T2 is less than the more modern TV eyepieces. Therefore, I will use higher power eyepieces--which also by virtue of their higher powers produce darker fields--for, say, galaxy hunting from my Bortle 6-7 backyard, and

--(4) yeah, the 20mm T2 is heavy. Luckily, so too are the rest of my eyepieces, if need be with the brass adapter that TV sells. 

 

For years, the most used EP in my box was actually the 13mm T1, though. Yes, it kidney beans. Yes, I learned to hold my eye so this wasn't a problem. I think it is still a great and underrated eyepiece. However, the 10mm Ethos is a masterwork. Oh, and the 7mm T1 is also fantastic eyepiece and I have no plans to ever replace it. Maybe Ole Al's greatest competition is himself?

 

Happy observing always,

 

Don


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#23 Spartinix

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Posted 27 March 2020 - 04:30 AM

I loved my Nagler 20mm T2. But after buying an Ethos 13, I sold it to fund an Ethos 21, which I loved too. But now I've sold that one also to start investing in a binoscope.

 

So in the end I'll probably be looking for two Nagler 20mm T5's I guess smile.gif.



#24 Jon Isaacs

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Posted 27 March 2020 - 05:16 AM

Maybe Ole Al's greatest competition is himself?

 

:waytogo:

 

I parted ways with my 20mm Type 2 after acquiring the 21mm Ethos.  

 

Jon



#25 Miranda2525

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Posted 27 March 2020 - 06:54 AM

Good point. IME a common issue which sometimes necessitates the need for 1.25" & 2" eyepiece Dew Heaters.

Or longer eye relief eyepieces. grin.gif Too bad because it's one of the best eyepieces for correction in fast telescopes!


Edited by Miranda2525, 27 March 2020 - 06:55 AM.



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