670 replies to this topic

[TayM57]

I initially missed the announcement from TeleVue about their new Nagler Type 7s, because it got buried in the 400+ post thread. 

 

From Televue, 

 

 

 

 

Concept

The Nagler Type 7 series was developed as a natural extension of our highly regarded, 85°, limited edition Apollo 11 eyepiece. However, the series can also be thought of as an extension of the long eye relief Nagler Type 4 concept. With the all-new Type 7 design layout, we achieved our goal of Apollo 11-like performance across a series of focal lengths that are eyeglass friendly.

 

Design Goals

The design goal was simple. The performance of each of the Type 7 focal lengths must equal or exceed that of the Apollo 11 eyepiece in the areas of full-field sharpness, contrast, distortion correction, eye relief, and pupil comfort, but across an 82° apparent field of view instead of 85°.

If you have been waiting for a Nagler series for eyeglass wearers, the Type 7 is it. Combining the expansive 82° apparent field of view with 19 mm of eyeglass friendly eye relief, and large eyelens, the Nagler Type 7s give a new dimension to the “spacewalk” viewing effect. An easily adjustable, locking eye-guard is included for those who don’t wear eyeglasses. It helps to correctly position your eye to the exit pupil so you don’t get too close to the eyelens, as well as blocks contrast-robbing stray light from interfering with the view. Speaking of which, of course we’ve applied all the optical coating and baffling features Tele Vue eyepieces are known to maximize contrast and complement the fully corrected field; revealing beautifully natural star colors with pinpoint sharpness. The optical layout affords unrivalled parfocality throughout the four focal lengths and even between 1¼” and 2” modes when used with the Tele Vue Hi-Hat 1¼” to 2” adapter (ASF-8125). The Type 7 series is also parfocal with all other 1¼” Tele Vue eyepieces (except 40 mm Plössl) when those eyepieces are used in the Tele Vue Hi-Hat 1¼” to 2” adapter (ASF-8125). Available in focal lengths of 5.5, 9, 14, and 19-mm, the Type 7s complement the 22-mm Type 4 and 31-mm Type 5 as eyeglass friendly Naglers.





Availability & Pricing

We anticipate that the eyepieces will be available from Tele Vue dealers in early summer of 2025. Pricing not available at this time.


More Info

Our Tele Vue Eyepiece Calculator has now been updated to include the Nagler Type 7 eyepieces (mobile site)
Complete specifications for the Nagler Type 7 are on our Eyepiece Specifications page (mobile site)

Edited by TayM57, 07 February 2025 - 02:59 PM.

[TayM57]

I'm cautiously optimistic about this new EP line, especially if it is based on the A11 design. I do wonder what the effective, that is, the measured, eye relief from the eye lens is. This EP set gives me a lot of hope for getting tack sharp stars in my faster scopes while offering long eye relief. Something the Morpheus comes close to, but doesn't quite achieve like the A11 did. 

Edited by TayM57, 07 February 2025 - 02:38 PM.

[Mr. Mike]

Hmmm.  Im sure they will be good but whether most will upgrade from what they have remains to be seen.  I myself am 100% content with my Delos EPs and Pentax XWs and Ive never felt any benefit from 82 degree FOV eyepieces, regardless of who makes them. 70-72 degrees is my max. But thats just me.

 

So, with 19mm of ER and adjustable thingies, these are more or less like a Delos with 10 degrees more AFOV.  Thats cool.

 

Curious as to what they'll cost. If you dont need or desire the extra ER then how much of an upgrade over your existing Naglers will they be?

 

One probable good thing:  There will be a slew of used TV eyepieces hitting the classifieds as the TV-faithful scoop these up.  Great chance to get some Type 6 Naggies or maybe some Deloi?  I might shop myself.

Edited by Mr. Mike, 07 February 2025 - 02:46 PM.

[alnitak22]

Nice looking…I especially like the 19mm and is the one I might have to have.

[TayM57]

I think I'll get them all, especially if they are tack sharp while being eye glasses friendly.

[triplemon]

Straight barrels, no undercuts !

[Piero DP]

Curious as to what they'll cost. If you dont need or desire the extra ER then how much of an upgrade over your existing Naglers will they be?

My guess is the cost of a Delos plus the cost difference between a Delos and Delite. In the end it Is another jump of 10 deg, although of course these come with some attractive ergonomics features.

[steveward53]

So despite a thirteen page thread running on the subject you still felt the need to start another ... 

[Astrojensen]

So despite a thirteen page thread running on the subject you still felt the need to start another ... 

Just as I predicted. 

 

 

Clear skies!

Thomas, Denmark

[scotsman328i]

The Televue 5.5mm Peppermill! 

[Fivemileshigh]

I wonder about the thinking behind making a 19mm Nagler with 19mm ER, when the 22 also has 19mm ER. Is the correction on the Type 7 that much better than the Type 4? I can't think of any other advantages.

[SeattleScott]

I wonder about the thinking behind making a 19mm Nagler with 19mm ER, when the 22 also has 19mm ER. Is the correction on the Type 7 that much better than the Type 4? I can't think of any other advantages.

The T4’s were not as well corrected as the typical Nagler, and have mostly been discontinued. I would expect the T7 to be better. If you already have a 22T4, is it worth getting the 19T7? That’s a question people will have to answer for themselves. It does somewhat beg the question if the 22T4 could eventually be retired, but honestly I see them being a bit different. The 22T4 is more of a true 2” eyepiece. The 19T7 has about the same field stop as the 24 Panoptic. More of a max FOV 1.25” eyepiece but with a 2” barrel. I would see the 22T4 as a potential lowest power eyepiece for a F4 or F4.5 Dob. I could see the 19T7 as a step down from something like a 35 Panoptic in a refractor.

[Starman1]

Hmmm.  I'm sure they will be good but whether most will upgrade from what they have remains to be seen.  I myself am 100% content with my Delos EPs and Pentax XWs and I've never felt any benefit from 82-degree FOV eyepieces, regardless of who makes them. 70-72 degrees is my max. But that's just me.

 

So, with 19mm of ER and adjustable thingies, these are more or less like a Delos with 10 degrees more AFOV.  Thats cool.

 

Curious as to what they'll cost. If you don't need or desire the extra ER then how much of an upgrade over your existing Naglers will they be?

 

One probable good thing:  There will be a slew of used TV eyepieces hitting the classifieds as the TV-faithful scoop these up.  Great chance to get some Type 6 Naggies or maybe some Deloi?  I might shop myself.

As one for whom 82° is the minimum apparent field I like, these will be much appreciated.

 

I found the Morpheus optically superior to the Long Perng LHD, but these will be wider still, yet I found them easy to use with glasses on (yes, I've reviewed them all as prototypes).

The weights are not excessive, I like the peppermill shape because it makes them easy to hold and to pick up out of a case if they are stored horizontally.

I suspect they'll be close to twice the price of the T6s.  If you don't need the extra eye relief, don't do outreach, or have a scope that is very weight sensitive to eyepieces, these may not be for you.

But if you do, these are a logical extension of the 31mm and 22mm Naglers.  I suspect, though, that people may find the 31mm >19mm jump just fine.  In my 1826mm focal length scope, that's 59x > 96x, a jump of only 37x, so no need for a 22mm in between.

 

Obviously, there needs to be a 7mm, but whether there will be an 11mm, who knows.  11mm eyepieces are oddballs, and many simply skip over them.  If I were Tele Vue, I'd be afraid of that focal length's sitting on the shelf for years.

In an 8" f/6 scope, the jump from 14 to 9mm is 47x, about right for a jump on an 8" scope.  On a 16" f/4.5, it's a jump of 72x, about right for that aperture.  So an 11mm may just not be needed in the range.

 

I look forward to seeing the production pieces.

[Starman1]

I wonder about the thinking behind making a 19mm Nagler with 19mm ER, when the 22 also has 19mm ER. Is the correction on the Type 7 that much better than the Type 4? I can't think of any other advantages.

The jump from the 31mm to a 19mm is about perfect in a lot of scopes.

I'd have preferred 20mm, but there was probably a design reason for 19mm.

[Simon Chung]

The jump from the 31mm to a 19mm is about perfect in a lot of scopes.

I'd have preferred 20mm, but there was probably a design reason for 19mm.

Do you know if the design can be scaled longer than 19mm? Say 24-26mm? This could be a good alternative to the 31mm without the bulk and weight. 

[CHASLX200]

Nothing that really grabs me. But do need something since i got a 7mm Delite and nothing in the middle until my 15mm TV Wide field. Most all my stuff is all bunched at high powers from the 7mm and 5mm Delite and then a 4mm Raidan and a 3.5mm Nag and a 3.2mm and a 2.8mm Tak and a 2.5mm LV so a 2mm would really be nice and a 9 and 11mm to fill in a gap chaps. Also have a 7mm and 4.8mm Nags T1's but they are nose bleed on ER and i find the Delites give a better image.  The Delites give the best images in all my scopes at powers that are not too crazy.

[Starman1]

Do you know if the design can be scaled longer than 19mm? Say 24-26mm? This could be a good alternative to the 31mm without the bulk and weight. 

I don't know.  It seems it really doesn't matter what focal lengths are picked to introduce a new line because everybody seems to want a different focal length that isn't coming.

I do know this: it is highly unlikely there will be a focal length shorter than 5.5mm.

Since most glasses wearers can remove their glasses at focal lengths that are shorter than that, that leaves the:

5mm and 3.5mm T6, the 4.7mm and 3.7mm Ethos, the 4.5mm and 3.5mm Delos, and the 5mm, 4mm, and 3mm Delites for shorter focal length use.

[ChristianG]

Interesting! Are they going to be known as the...

 

​

 

???

 

Sorry, couldn't resist. 
 

--Christian

 

[Zuben el Genubi]

Do you know if the design can be scaled longer than 19mm? Say 24-26mm? This could be a good alternative to the 31mm without the bulk and weight.

[Zuben el Genubi]

Have to bring back the 26mm Nag type 5!
( true FOV replaced by ethos 21 )

[TayM57]

Since most glasses wearers can remove their glasses at focal lengths that are shorter than that, that leaves the:

5mm and 3.5mm T6, the 4.7mm and 3.7mm Ethos, the 4.5mm and 3.5mm Delos, and the 5mm, 4mm, and 3mm Delites for shorter focal length use.

Most, but not all. I have to leave my glasses on at all focal lengths. These new T7's have me seriously excited, mostly because stars will very likely be pinpoints in them like they are in the Delos in my faster scopes.

[Tangerman]

I was hoping to pick up a Morpheus to try out towards the end of this year, and maybe one of the coma-corrected eyepieces that are coming too, as they also are supposed to have long eye relief. Now this comes too. Suddenly we're getting more choices for long eye relief, well-corrected, ultra wide AFOVs, and I think it's great, even if it makes it harder to pick!

[The Ardent]

I think they are hideous in appearance but very desirable for use.

I’m pleased that TeleVue has further developed the astronomical eyepiece.

It’s annoying to have invested in Ethos , Delos, and Pentax 85° over the years and now this.

[Alex.C]

I might be biased, but this new eyepiece series strikes me as something of a "rich man's Long Perng LER".

A FOV of 82° vs. 80°, a spread of 19-14-9-5.5 vs. 20-14-9-6, and similar prodigious sizes and maraca shapes, especially in the shorter focal lengths.

I'm certain that critical observers will end up rating these more highly, with Tele Vue's usual edge in sharpness and contrast. But thrifty folk might be able to get an almost full set of something rather similar (even available in green!) for the price of one NT7, especially here in Europe.

[JeremySh]

 

Obviously, there needs to be a 7mm, but whether there will be an 11mm, who knows.  11mm eyepieces are oddballs, and many simply skip over them.  If I were Tele Vue, I'd be afraid of that focal length's sitting on the shelf for years.

 

As I mentioned in the other thread, the absence of an 11mm is a nod to those lucky enough already to own the Apollo 11.