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11 T 6 Nagler?

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#1 greenstars3

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Posted 19 February 2020 - 02:21 PM

I just purchased an 11 T6 Nagler to fit between a 13 and a 9 for use in a 180 Mewlon. The seeing sometimes requires a smaller jump than a 13 to a 9. Starman 1 stated that the 11 was one of the Naglers that had low sales numbers. Any other reason for discontinuing the 11 Nagler than that?

 

Robert 

 

ps: thanks David


Edited by greenstars3, 19 February 2020 - 02:25 PM.

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#2 Jacques

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Posted 19 February 2020 - 03:12 PM

I can't think of any.



#3 rowdy388

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Posted 19 February 2020 - 03:29 PM

I don't remember ever reading anything that said the 11mm NT6 wasn't excellent.

I bought a used one a couple years ago because it was a small and light alternative

to my other massive eyepieces around that happy 2mm exit pupil. It didn't disappoint.



#4 TOMDEY

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Posted 19 February 2020 - 03:46 PM

I filled in the gap with an Apollo 11. It's also heftier, so I don't drop it as often.   Tom

 

~click on~ >>>

Attached Thumbnails

  • 08 Apollo 11 gap-filler 75.jpg

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#5 desertlens

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Posted 19 February 2020 - 03:54 PM

The 11mm T6 was my first Nagler (some years ago now). It is small, light and excellent optically, especially in a small refractor. I suspect the weak sales were related to being too close to the 9mm or the 13mm or it was swamped by the 10mm Ethos.


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#6 sanbai

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Posted 19 February 2020 - 08:17 PM

For what I've heard in CN, the stated reason (too close to  the 13 and 9, with probably higher sales) may be the most significant.
Add that people is diverting from Naglers due to 100 deg eyepieces and long eye relief ones, so sales probably went down and, when stock was exhausted they decided not to invest in another (expensive) production run.

ALL speculation, though. So far, no bad reviews around that justify that.

Take into account that your scope has a long focal ratio and this eyepiece is in the zone high power zone and calls for small step increments. For faster scopes like dobs or some refractors, people probably prefer going from 13mm to 9mm as that is in their mid power area.


Edited by sanbai, 19 February 2020 - 09:33 PM.


#7 TOMDEY

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Posted 19 February 2020 - 09:22 PM

If eyepieces were offered in 1mm increments, we just know that some people would feel unfulfilled if they lacked even one of ~the series~ And then line them all up, admire them, and snap a picture of them to carry in the wallet. If anyone knows of a Premium Series that is so-offered, please inform me, immediately!

 

PS: I note that some series, especially old pre-TeleVue classic vintages, were simply scaled from one formula. Modern premiums are often each completely optimized, and hold ergo parametrics constant... like eye-relief... nice... and expensive.

 

Here's a thought: A premium series that has fixed apparent field of view and effective eye relief (aka "feel the same") and incremented equal % focal lengths. That would make for peculiar fractional mm efls, but each step would be the same incremental amplification in image size. Ooops... starting to sound like the impossible ideal zoom eyepiece.    Tom



#8 helpwanted

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Posted 19 February 2020 - 10:35 PM

I talked to Al Nagler in the past about the different Nagler’s that were getting discontinued. he said when he orders them from the manufacture they make them in lots of 100, if you only sell five or six a year, it becomes a very expensive inventory to sit on the shelf. He told me the 26, the 20, the 11, and the 2.5, all suffered the same fate. 


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#9 greenstars3

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Posted 20 February 2020 - 12:54 AM

Tom I think you have been looking in my eyepiece case 35, 32, 28, 27, 24, 19, 15, 13, 11 10, 9,8, 7, 6, 5, 4, and 3. But I have no photos of them.crazyeyes.gif crazyeyes.gif

 

Robert

 

edit: 14, 12


Edited by greenstars3, 20 February 2020 - 12:57 AM.


#10 Jon Isaacs

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Posted 20 February 2020 - 01:04 AM

Take into account that your scope has a long focal ratio and this eyepiece is in the zone high power zone and calls for small step increments. For faster scopes like dobs or some refractors, people probably prefer going from 13mm to 9mm as that is in their mid power area.

 

 

I purchased the 11mm Type 6 recently to fill the gap between the 13mm and 9mm Type 6's in F/4.4 Dobs, they're around F/5.06 with the Paracorr.  The 13mm to 9 mm span is just too wide when teasing out faint galaxies.  Sometimes the 11mm is best, sometimes the 13mm is best and sometimes the 9mm shows the galaxy the best.  The three covers the 2mm exit pupil region nicely, 1.8mm, 2.2mm and 2.6mm...

 

As others have suggest, the 10mm Ethos may have killed the sales of the 11mm Nagler.  I really should just bite the bullet and buy a 10mm Ethos to fit between the 13mm and the 8mm.

 

Jon


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#11 Starman1

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Posted 20 February 2020 - 01:56 AM

Tele Vue's own site extols the virtues of a 40% change between eyepieces. That's a 13 to 9mm switch. The 11mm just didn't fit many magnification change protocols except for very long focal length scopes--say, over 3000mm, and there just aren't that many of them.

#12 Jon Isaacs

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Posted 20 February 2020 - 11:50 AM

Tele Vue's own site extols the virtues of a 40% change between eyepieces. That's a 13 to 9mm switch. The 11mm just didn't fit many magnification change protocols except for very long focal length scopes--say, over 3000mm, and there just aren't that many of them.

 

Nonetheless, my 72 year old "not so great observing eye" does see a difference between the 9 mm, the 11mm and the 13 mm and depending on the object, anyone of the three can provide the optimal view.  Its similar to a zoom but with fixed focal lengths.

 

Jon


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#13 Starman1

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Posted 20 February 2020 - 12:58 PM

I talked to Al Nagler in the past about the different Nagler’s that were getting discontinued. he said when he orders them from the manufacture they make them in lots of 100, if you only sell five or six a year, it becomes a very expensive inventory to sit on the shelf. He told me the 26, the 20, the 11, and the 2.5, all suffered the same fate. 

Actually, it's more like 300 (or more) of each, but your point is still good.


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#14 Starman1

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Posted 20 February 2020 - 01:20 PM

I purchased the 11mm Type 6 recently to fill the gap between the 13mm and 9mm Type 6's in F/4.4 Dobs, they're around F/5.06 with the Paracorr.  The 13mm to 9 mm span is just too wide when teasing out faint galaxies.  Sometimes the 11mm is best, sometimes the 13mm is best and sometimes the 9mm shows the galaxy the best.  The three covers the 2mm exit pupil region nicely, 1.8mm, 2.2mm and 2.6mm...

 

As others have suggest, the 10mm Ethos may have killed the sales of the 11mm Nagler.  I really should just bite the bullet and buy a 10mm Ethos to fit between the 13mm and the 8mm.

 

Jon

Well, whether 11mm or 10mm is your choice, the 11mm T6 was just not a good seller.

Neither was the 2.5mm.



#15 BDS316

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Posted 20 February 2020 - 01:28 PM

The 11mm Nagler is a favorite of mine with my 8in f6 Dob. 110x with a three quarter degree field and just under a 2mm exit pupil makes it the perfect medium power eyepiece for 8in f6.

#16 Jon Isaacs

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Posted 20 February 2020 - 03:03 PM

Well, whether 11mm or 10mm is your choice, the 11mm T6 was just not a good seller.

Neither was the 2.5mm.

 

Indeed, the 10mm Ethos would have been the more useful eyepiece since I normally use the 13 mm and 8 mm Ethos for galaxies.. But I just can't bring myself to spend $450 for a used eyepiece and so I ended up purchasing both the 13 mm and the 11mm Type type 6s used for about what a 10 mm Ethos would be used.

 

Kinda of stupid really and one of these days I'll probably buy a 10mm Ethos. :scratchhead:

 

Jon



#17 John Turley

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Posted 20 February 2020 - 03:39 PM

The 11mm Nagler is a favorite of mine with my 8in f6 Dob. 110x with a three quarter degree field and just under a 2mm exit pupil makes it the perfect medium power eyepiece for 8in f6.

I agree, I bought one recently when the Tele Vue sale was on before Christmas from a dealer in the UK who still had one in stock.

Don't know whether any dealers still have them, otherwise second hand will be the only source.

 

John 



#18 BGazing

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Posted 20 February 2020 - 04:21 PM

I bagged my 11mm from RAKing here, sits between 13 and 9mm.

In C8, 11mm is used more than 9mm, due to seeing, and is the go-to EP for Saturn and Moon. If seeing permits, plop 9mm.

In 100mm f/7.4 refractor, I normally jump from 13mm to 7mm, 60x to 100x.

Now that I have a portable f/5 12 inch dob it will be interesting, especially once the Paracorr arrives. Bring on the galaxy season, 11mm might very well be the stop-gap Jon talks about. 


Edited by BGazing, 21 February 2020 - 01:55 PM.


#19 Dave Mitsky

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Posted 20 February 2020 - 10:59 PM

I filled in the gap with an Apollo 11. It's also heftier, so I don't drop it as often.   Tom

 

~click on~ >>>
 

And it's only 3.9 times more expensive than the 11mm Nagler T6. wink.gif



#20 TOMDEY

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Posted 20 February 2020 - 11:21 PM

And it's only 3.9 times more expensive than the 11mm Nagler T6. wink.gif

The Apollo 11 has such generous eye relief... that I can just look over toward the telescope from the other side of the dome... and enjoy the entire 85o field!    Tom



#21 Jon Isaacs

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Posted 21 February 2020 - 07:01 AM

The Apollo 11 has such generous eye relief... that I can just look over toward the telescope from the other side of the dome... and enjoy the entire 85o field!    Tom

Now that would take a huge eye lens.  

 

Jon



#22 turtle86

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Posted 21 February 2020 - 07:54 AM

Indeed, the 10mm Ethos would have been the more useful eyepiece since I normally use the 13 mm and 8 mm Ethos for galaxies.. But I just can't bring myself to spend $450 for a used eyepiece and so I ended up purchasing both the 13 mm and the 11mm Type type 6s used for about what a 10 mm Ethos would be used.

 

Kinda of stupid really and one of these days I'll probably buy a 10mm Ethos. scratchhead2.gif

 

Jon

 

I use the 10mm Ethos a lot in my Dobs for galaxies, as well as globs.  It's very sharp and it just might be my favorite Ethos. 


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#23 coutleef

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Posted 21 February 2020 - 08:00 AM

i agree

the 10,8,6 ethoi are jewels in a 12 inch dob
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#24 Mike W

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Posted 21 February 2020 - 03:38 PM

For my 880mm refractor I find all I need are a 24mm, 19 mm, 14 mm, 10 mm, 8 mm , 6 mm, and 5 mm, Though in a Mewlon I can see the need for a shorter jump.

36x

46x

62x

88x

110x

146x

176x


Edited by Mike W, 21 February 2020 - 03:42 PM.


#25 Jon Isaacs

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Posted 22 February 2020 - 12:35 AM

For my 880mm refractor I find all I need are a 24mm, 19 mm, 14 mm, 10 mm, 8 mm , 6 mm, and 5 mm, Though in a Mewlon I can see the need for a shorter jump.

36x

46x

62x

88x

110x

146x

176x

Is 176X the highest magnification you generally use?  I am assuming it's 4 inch?

 

Jon




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