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Stellarvue Ultra Wide Angle EP's

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14 replies to this topic

#1 NIckwin

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Posted 11 January 2017 - 03:41 PM

Does anyone know anything about the new Stellarvue UWA's?  At least I think they are new because I can't find anything about these focal lengths, they currently have 4, 8, and 15mm available.  I just purchased a SV80A (really excited) and they had deal going where you get the 8mm and 15mm for a little over $100 so I jumped on it.  I had been planning on getting ES 82 degree EP's, but I just couldn't pass these up for the $. Im hoping these will perform similarly.  Anyone tried them?  Or know anything about the design and/or origins?


Edited by NIckwin, 11 January 2017 - 03:41 PM.


#2 dufay

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Posted 11 January 2017 - 03:51 PM

Haven't noticed these before. They are probably another variation of the UWANs, thought the specified focal lengths have been changed from 7mm to 8mm and from 16mm to 15mm. Don't know if this means that that the actual focal lengths are different? I think probably not.



#3 NIckwin

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Posted 11 January 2017 - 04:10 PM

Never occurred to me that they might actually be the same. The 16 and 7mm looked diffierent than these didn't they?

#4 Miranda2525

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Posted 11 January 2017 - 04:11 PM

Same as Uwans.



#5 dufay

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Posted 11 January 2017 - 04:16 PM

Never occurred to me that they might actually be the same. The 16 and 7mm looked diffierent than these didn't they?

 

They look very much alike the new TS UWANs, but with a special Stellarvue twist reminiscent of their 100° line.



#6 NIckwin

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Posted 11 January 2017 - 04:41 PM

Cool, thanks.

How do they perform? Are they on par with the ES equivalents?

#7 dufay

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Posted 11 January 2017 - 05:01 PM

I think the common view is that they are in the ES class performance wise. The 16mm is often considered the weakest of the line (though still a decent performer) and I've read a lot of good things about the 4mm. However, eyepiece preferences are very personal and you will find a lot of different opinions on this series and its individual focal length.


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#8 NIckwin

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Posted 11 January 2017 - 05:12 PM

Cool, thanks for the info! It sounds like at $65 a piece it would be hard to do any better.  I'm hoping they will be sharp to the edge at f/7. 


Edited by NIckwin, 11 January 2017 - 06:07 PM.

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#9 dufay

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Posted 11 January 2017 - 05:29 PM

$65 a piece is very cheap for these eyepieces, so you did a very good deal there.


Edited by dufay, 11 January 2017 - 05:30 PM.


#10 Starman1

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Posted 11 January 2017 - 05:47 PM

A year ago, they had 3 focal lengths of 82° eyepieces of 4, 7, and 16mm, and I reported them in the 2016 Guide to eyepieces.

They were identical to the UWANs (and 5 other brands of the same eyepieces).

Today, they report 4mm, 8mm, and 15mm and are $50 apiece less expensive, at $149 each.

I'll have to change this in the upcoming 2017 Buyer's Guide.

They are obviously not a redesigned barrel on the old ones.  Field stops are different.

Interesting.


Edited by Starman1, 11 January 2017 - 05:49 PM.


#11 junomike

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Posted 11 January 2017 - 05:54 PM

A year ago, they had 3 focal lengths of 82° eyepieces of 4, 7, and 16mm, and I reported them in the 2016 Guide to eyepieces.

They were identical to the UWANs (and 5 other brands of the same eyepieces).

Today, they report 4mm, 8mm, and 15mm and are $50 apiece less expensive, at $149 each.

I'll have to change this in the upcoming 2017 Buyer's Guide.

They are obviously not a redesigned barrel on the old ones.  Field stops are different.

Interesting.

Don, I know the FS size controls the AFOV, but I thought the F/L was inherent to the optical design?

 

Mike



#12 dufay

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Posted 11 January 2017 - 06:13 PM

Might it not be that Stellarvue just have updated the specifications so that they better represents reality? It is been known for a long time that the 7mm UWAN is closer to 8mm, so maybe the previously given field stop specifications have been misrepresented so that the focal length-FOV  equation should add up on paper(?).

 

I would be very surprised to find out that this new Stellarvue line is not the same as the new TS UWAN line. They look absolutely identical apart from a few superficial features (eyecup, 1.25" barrel and rubber grip band). TS have kept the old 4/7/16mm focal length specifications.


Edited by dufay, 11 January 2017 - 06:14 PM.


#13 North of Sixty

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Posted 12 January 2017 - 08:49 PM

Mega gratz on your new scope NIckwin. I've been thinking about getting the 15mm as my first non-cheapo eyepiece so I'm looking forward to hearing what you think about it.  And of course your first light with the other eyepieces and the sweet SV80A (it's on my short list!). Cheers.


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#14 NIckwin

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Posted 13 January 2017 - 10:02 AM

Mega gratz on your new scope NIckwin. I've been thinking about getting the 15mm as my first non-cheapo eyepiece so I'm looking forward to hearing what you think about it.  And of course your first light with the other eyepieces and the sweet SV80A (it's on my short list!). Cheers.

 

Thanks!  This my first refractor, my first telescope with quality optics, my first telescope with a wide field of view, and my first telescope with a decent focuser (among other firsts) so I am very excited and anxious to get my hands on it.

 

I'll be curiously watching how this pans out as to the origins of these EP's, if they end up being the old UWANs they are priced pretty competitively.  I don't know how much help my opinion will be but I will certainly share what I can when I have them in front of me.

 

Nick 


Edited by NIckwin, 13 January 2017 - 10:05 AM.

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#15 Marcsabb

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Posted 13 January 2017 - 03:02 PM

Might it not be that Stellarvue just have updated the specifications so that they better represents reality? It is been known for a long time that the 7mm UWAN is closer to 8mm, so maybe the previously given field stop specifications have been misrepresented so that the focal length-FOV  equation should add up on paper(?).

 

I would be very surprised to find out that this new Stellarvue line is not the same as the new TS UWAN line. They look absolutely identical apart from a few superficial features (eyecup, 1.25" barrel and rubber grip band). TS have kept the old 4/7/16mm focal length specifications.

The new TS UWANs are waterproof and filled with nitrogen. If the ones from Stellarvue also share these specs, then there is no doubt they come from the same assembly line.




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