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AL A.
super member


Reged: 12/11/05
Posts: 105
FLT110, SV115, or NP-127 ?
      #725298 - 12/11/05 01:40 PM

Hello. This is my first post.

I am trying to decide between several APOs, primarily for visual use but eventually for photographic use as well, and have narrowed my choices to the William Optics FLT110 with the soon-to-be released two-speed focuser, the Stellarvue SV115, and the TeleVue NP-127. Portability is important to me and these are all in the 14-16 lb range.

My concern with the FLT110 is that it seems the TEC lens is considered to be slightly inferior to the TMB lens in the SV115 and the TeleVue lens. If so, is the difference significant enough to warrant spending hundreds or thousands of dollars more for the SV115 or the NP-127? Otherwise, the FLT110 seems to be a terrific telescope.

My concern with the SV115 is primarily that a friend who has been to the Northeast Astronomical Forum in Suffern, NY the past several years told me that, in his opinion, the "fit and finish" of Stellarvue scopes is "not as good as TeleVue or Astro-Physics". I don't know which Stellarvue telescopes he was able to see. Of lesser concern is the 2" focuser (versus 4" in the FLT110).

My concerns with the NP-127 are the significantly higher cost and the single speed 2" focuser.

Considering the cost of these telescopes, I'd like to buy a telescope that I'll be happy with for many years.

I would appreciate your comments, suggestions, and guidance. Thank you.

Al


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Ron B[ee]
Tyro


Reged: 04/27/03
Posts: 4720
Loc: CA
Re: FLT110, SV115, or NP-127 ? new [Re: AL A.]
      #725314 - 12/11/05 01:53 PM

Wow, difficult choices, all are very fine APO refractors, Al! BTW, though I've no experience first hand, I've not heard anything about the TEC lens being inferior!

Given the choices and budget possibility, I'd personally go with largest aperture in a lightest package: so the NP127 . The Tele Vue has dual-speed focuser options via the Focusmate or FeatherTouch Micro. The 4-inch focuser is needed if you want to do medium format film photography. For photographic, the NP127 has the widest field of view and the Petzval design automatically give you a flat field photography.

Here are some articles that might be of use to you.
http://users.adelphia.net/~ronbee/Toys/NP127-FirstDay.html
http://users.adelphia.net/~ronbee/Toys/NP127SPEQ-TV102Bogen.jpg
http://www.cloudynights.com/item.php?item_id=1171
If you eventually decide to go with the NP127, please do give Tele Vue a call *before* you buy and insist on speaking with David or Al Nagler about your choice .

Best wishes to your quest for very fine APO refractors indeed! I can't imagine you'd be disappointed with either one of the choices listed. So it all comes down to personal preference .

Ron the 5-inch Tall Evangelist B[ee]

--------------------
5-inch Tele Vue NP127 APO
4-inch Tele Vue TV-102 APO


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Teal'c
Indeed


Reged: 08/02/05
Posts: 4268
Re: FLT110, SV115, or NP-127 ? new [Re: Ron B[ee]]
      #725345 - 12/11/05 02:11 PM

Ron, I would not have thought the NP127 would be lighter but you're right! I just checked the specs.

Not that I didn't believe you.

--------------------









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LLEEGEModerator
True Blue


Reged: 03/03/05
Posts: 12767
Loc: Cloud-chester,NY
Re: FLT110, SV115, or NP-127 ? new [Re: Ron B[ee]]
      #725349 - 12/11/05 02:12 PM

Dang it all Ron, I was this close to buying the FLT-110 and now you've gone and made me second guess myself! Arg I better hurry up and buy something before I go NUTS!!!!!!

--------------------
A wise man once said........nothing.

A good mount
A few good OTA's
A few good EP's
A decent camera
Crappy skies


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Ron B[ee]
Tyro


Reged: 04/27/03
Posts: 4720
Loc: CA
Re: FLT110, SV115, or NP-127 ? new [Re: LLEEGE]
      #725364 - 12/11/05 02:19 PM

Quote:

Dang it all Ron, I was this close to buying the FLT-110 and now you've gone and made me second guess myself! Arg I better hurry up and buy something before I go NUTS!!!!!!




I saw the FLT-110 at OPT, John. It's a beautifully finely crafted APO refractor . In my opinion, the gold trim gave it a lot of class! Alas, David Yang did not stay to give us all a night time view . I cannot in any of my wildest imagination think that you'd be disappointed with the purchase!

Ron the 4-inch Tall Evangelist B[ee]

--------------------
5-inch Tele Vue NP127 APO
4-inch Tele Vue TV-102 APO


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blandp11
Carpal Tunnel


Reged: 04/19/05
Posts: 1963
Loc: Glen Ridge, NJ USA
Re: FLT110, SV115, or NP-127 ? new [Re: AL A.]
      #725368 - 12/11/05 02:20 PM

I would have recommended the TEC140 as it is cheaper than the TV 127, but it is heavier. For your portability requirments the TV 127 will be the best, albeit expensive, choice.

The TV 127, being a Petzval flat field design, will not require a flat field lens attachment when taking DSLR sensor size images - which is a big plus.

Philip

--------------------


Mostly refractors


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PhilG
Pooh-Bah


Reged: 01/27/05
Posts: 1229
Loc: Denver, CO - USA
Re: FLT110, SV115, or NP-127 ? new [Re: Ron B[ee]]
      #725373 - 12/11/05 02:22 PM

Hi Al,

I can't help you out with any direct comparisons but in comparing the SV115 and FLT110 don't forget to take into account the accessories included with the SV115 at the $3995 price: mounting rings, dual speed focuser, dielectric diagonal, which would bring these two scopes to roughly the same price. In which case you're down to the lens design, 5mm of aperture and quality of construction.

I've owned both WO (80mm SD II) and SV (SV80L) scopes and the SV scope is superior in fit, finish, construction and durability.

Good luck,
Phil

--------------------
--------------------
TEC, Stellarvue, Celestron, WO
AP, Takahashi, Apogee , Explora-Dome
http://www.infiniti-eng.com/astrophotos


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AL A.
super member


Reged: 12/11/05
Posts: 105
Re: FLT110, SV115, or NP-127 ? new [Re: Ron B[ee]]
      #725382 - 12/11/05 02:27 PM

Hi Ron, thanks for the prompt reply and thanks for the links - I'll review them shortly. In regards to the TEC lens being slightly inferior, in the June 2004 edition of Sky and Telescope, Alan Dyer reviewed an earlier version of the FLT110 with the old 4" focuser. On page 96, he states, "I judge the level of color correction in the Fluoro-Star to be a notch below the finest models from Astro-Physics, TMB, and TeleVue..." although he goes on to say that "the level of color the Fluoro-Star does show is at a nitpicking level...".

Thanks again for your input and the links.

Al


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AL A.
super member


Reged: 12/11/05
Posts: 105
Re: FLT110, SV115, or NP-127 ? new [Re: AL A.]
      #725395 - 12/11/05 02:32 PM

Hi Philip and Phil, thank you for your input. This decision is going to be tougher than I thought it would be!

AL


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badsnoopy
One star is enough


Reged: 12/20/04
Posts: 3556
Loc: La Porte, IN
Re: FLT110, SV115, or NP-127 ? new [Re: AL A.]
      #725424 - 12/11/05 02:47 PM

Well Al I have the SV115. Except for a small cosmetic problem with mine when I got it the fit and finish are outstanding. By the way, Vic was great and took care of my problem very quickly. Think it comes down to a personal decision more than if one is all that much better than the others. My suggestion is to put hands,and eyes, on before you buy one. Depending on where your at mine is available for inspection. That's if your close enough to visit. Otherwise look for stores that carry them or owners that are willing to let you see it. Best of luck.

--------------------
Robert

TV Genesis SDF
Losmandy G11
10x14 Roll roof observatory
Lumenera SkyNyx 2-2m


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Herenomore
Carpal Tunnel


Reged: 11/29/04
Posts: 1833
Re: FLT110, SV115, or NP-127 ? new [Re: AL A.]
      #725518 - 12/11/05 03:43 PM

Quote:

My concern with the SV115 is primarily that a friend who has been to the Northeast Astronomical Forum in Suffern, NY the past several years told me that, in his opinion, the "fit and finish" of Stellarvue scopes is "not as good as TeleVue or Astro-Physics". I don't know which Stellarvue telescopes he was able to see. Of lesser concern is the 2" focuser (versus 4" in the FLT110).



Hmm...I would think that the SV would have been as good if not better...Vic makes a superb instrument. As for comparisons between the SV115 and FLT110, this was posted in a recent thread by a guy who owns both an FLT110 and a TMB115 (which is basically the same as the SV115):

Quote:

I have both and can confirm the 115 has less color, more like: the 110 has very little and the 115 has essentially none. Both have excellent, well corrected wavefronts.

Like most owners, I don't think the WO 4" R&P focuser is very good, the new crayford is allegedly much better, an upgrade is supposedly coming. The feathertouch 2" or better yet the 3.5 are the new standard.




Tom


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AL A.
super member


Reged: 12/11/05
Posts: 105
Re: FLT110, SV115, or NP-127 ? new [Re: badsnoopy]
      #725529 - 12/11/05 03:54 PM

Hi Robert, thank you for the offer to examine the SV115 but I live in Virginia. After reading the replies, I think it'll come down to the SV115 and the NP-127. I'll try to see examples of both as you suggest. One question - what are the options for a field flattener with the SV115? Thanks.

Al


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PhilG
Pooh-Bah


Reged: 01/27/05
Posts: 1229
Loc: Denver, CO - USA
Re: FLT110, SV115, or NP-127 ? new [Re: AL A.]
      #725545 - 12/11/05 04:04 PM

Quote:

After reading the replies, I think it'll come down to the SV115 and the NP-127. I'll try to see examples of both as you suggest. One question - what are the options for a field flattener with the SV115? Thanks.

Al




Al,

I'd like to be making that decision

Why not also throw the SV130 into the mix. Its in the same aperture and price range as the NP-127 and comes with a 3.5" feathertouch focuser (drool), is faster than the SV115 at a penalty of about 6 extra pounds

It would be interesting if someone knowledgable could compare the differences in the lens designs between the NP-127 and SV115/130 scopes.

Phil

--------------------
--------------------
TEC, Stellarvue, Celestron, WO
AP, Takahashi, Apogee , Explora-Dome
http://www.infiniti-eng.com/astrophotos


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AL A.
super member


Reged: 12/11/05
Posts: 105
Re: FLT110, SV115, or NP-127 ? new [Re: Herenomore]
      #725553 - 12/11/05 04:07 PM

Hi Tom, I was surprised by my friend's comment regarding Stellarvue telescopes but I have never seen one in person. They appear to be highly regarded by many on this forum.

In regards to the lens, your quote from the other thread comparing the FLT110 and the TMB lenses confirms what Alan Dyer stated in his Sky and Telescope review.

Now the hard part, choosing between the SV115 and the NP-127!

Thanks.

Al


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badsnoopy
One star is enough


Reged: 12/20/04
Posts: 3556
Loc: La Porte, IN
Re: FLT110, SV115, or NP-127 ? new [Re: AL A.]
      #725556 - 12/11/05 04:09 PM

No problem Al. To bad you aren't closer. As far as a field flattener I'm not sure. Maybe get your questions together and call Vic tomorrow. I know that some guys are using the Televue 0.8x reducer/flattener with the SV scopes.

--------------------
Robert

TV Genesis SDF
Losmandy G11
10x14 Roll roof observatory
Lumenera SkyNyx 2-2m


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AL A.
super member


Reged: 12/11/05
Posts: 105
Re: FLT110, SV115, or NP-127 ? new [Re: PhilG]
      #725577 - 12/11/05 04:23 PM

Hi Phil,
I thought about the SV130, considering that it's cheaper than the NP-127, but I felt that it would require a heavier mount than the SV115 or the NP-127. I'm really trying to keep portability in mind. The SV130 sure would be nice though! Thanks.

Al


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blandp11
Carpal Tunnel


Reged: 04/19/05
Posts: 1963
Loc: Glen Ridge, NJ USA
Re: FLT110, SV115, or NP-127 ? new [Re: AL A.]
      #725622 - 12/11/05 04:51 PM

No question that the 127 will give better views on all classes of objects. In this class of APO, 12mm is too big a size difference and the quality of both too high for the smaller one to somehow make it up. The downside is the extra dollars for the 127.

Quote:

Now the hard part, choosing between the SV115 and the NP-127




--------------------


Mostly refractors


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badsnoopy
One star is enough


Reged: 12/20/04
Posts: 3556
Loc: La Porte, IN
Re: FLT110, SV115, or NP-127 ? new [Re: blandp11]
      #725640 - 12/11/05 05:05 PM

Well either way you should be very happy. The Televue is great but the same as the SV130S for my thoughts. At $3990 for the SV115, $5990 for the SV130S and $6250 for the NP-127 the extra 12-15mm wasn't worth another $2000. Visually it will give you some more light. As far as astrophotography I don't believe you will see that much benefit. Look at what folks are doing with the 80mm APO's. Heck that extra $2000 could get you a super grab and go APO. Either the TV-85 or SV80S could be had for that price. Always a ton of stuff to think about when buying a new scope.

--------------------
Robert

TV Genesis SDF
Losmandy G11
10x14 Roll roof observatory
Lumenera SkyNyx 2-2m


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Teal'c
Indeed


Reged: 08/02/05
Posts: 4268
Re: FLT110, SV115, or NP-127 ? new [Re: badsnoopy]
      #725646 - 12/11/05 05:12 PM

The photos that Matt Thomas took with the SV80S are incredible.

--------------------









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AL A.
super member


Reged: 12/11/05
Posts: 105
Re: FLT110, SV115, or NP-127 ? new [Re: blandp11]
      #725654 - 12/11/05 05:16 PM

Quote:

No question that the 127 will give better views on all classes of objects. In this class of APO, 12mm is too big a size difference and the quality of both too high for the smaller one to somehow make it up. The downside is the extra dollars for the 127.







The price difference is significant. I guess that's the question I'll have to answer - is it worth it to spend approximately $2000 more for the NP-127? Thanks.

Al


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