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WO Fluorostar 91 - new scope

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#51 alfogator

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Posted 15 November 2020 - 06:10 AM

Some info and pics here:

 

http://www.unitronit...ID=WOFLT91SGRP3



#52 skysurvey

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Posted 15 November 2020 - 06:29 AM

Some info and pics here:

 

http://www.unitronit...ID=WOFLT91SGRP3

Oh man, 2.515 €, it must be the most expensive thermometer of the history



#53 TareqPhoto

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Posted 15 November 2020 - 06:42 AM

Oh man, 2.515 €, it must be the most expensive thermometer of the history

Don't buy it from there, i am sure the same scope will be in another store for US$2000 or slightly less [maybe $1900?]



#54 skysurvey

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Posted 15 November 2020 - 08:02 AM

Don't buy it from there, i am sure the same scope will be in another store for US$2000 or slightly less [maybe $1900?]

No 1900, but 1382 €, that's the reason why I have said it must be the most expensive thermometer of the history (this doesn’t have the thermometer):

https://www.teleskop...ertificate.html


Edited by skysurvey, 15 November 2020 - 08:07 AM.


#55 TareqPhoto

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Posted 15 November 2020 - 08:49 AM

No 1900, but 1382 €, that's the reason why I have said it must be the most expensive thermometer of the history (this doesn’t have the thermometer):

https://www.teleskop...ertificate.html

I ordered this scope already but it is due to end of Jan next year, while we are talking about WO scopes here, and their Fluorostar isn't any cheap, so i am expecting this 91mm to be above $1500 or around1500 € if not more.


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#56 skysurvey

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Posted 15 November 2020 - 09:16 AM

I ordered this scope already but it is due to end of Jan next year, while we are talking about WO scopes here, and their Fluorostar isn't any cheap, so i am expecting this 91mm to be above $1500 or around1500 € if not more.

No, the WO 91 Fluorostar isn't any cheap but I have no idea why, IMO we are talking about a 2515€ telescope and about a 1382€ telescope that are the same, don't let you that 1mm of difference confuse you.

I can only see that the WO has a better focuser (not too much) and a thermometer, other than that... 

 

Can you tell where is the difference in price? Perhaps do you think the lenses, manufacturer, quality control is different? Please, explain me, I would like to know


Edited by skysurvey, 15 November 2020 - 09:30 AM.


#57 TareqPhoto

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Posted 15 November 2020 - 12:29 PM

No, the WO 91 Fluorostar isn't any cheap but I have no idea why, IMO we are talking about a 2515€ telescope and about a 1382€ telescope that are the same, don't let you that 1mm of difference confuse you.

I can only see that the WO has a better focuser (not too much) and a thermometer, other than that... 

 

Can you tell where is the difference in price? Perhaps do you think the lenses, manufacturer, quality control is different? Please, explain me, I would like to know

Don't ask me, in fact i am looking for a second ~90mm scope as well, and this WO is something i think about, but i agree, why it will be that much expensive, i saw it in one site for about $2062, not bad price, but i still waiting for the final confirmation price, then i can decide if i will go with that or something else, i can wait and see.

 

I was hoping that Astronomics Astro-Tech AT 92mm is less than $1500, and more i wish if it has FPL-53 optics, but sounds it is just more expensive with ED good quality optics but not FPL-53, so i won't pay that much if it isn't having FPL-53 or better like Fluorite, i will accept FPL-55 at least, FCD-100 is in same league, anything else i think i shouldn't risk, unless some can show me results from that AT92 with no colors issues without heavy processing, and i mean RGB results.



#58 skysurvey

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Posted 15 November 2020 - 02:58 PM

Don't ask me, in fact i am looking for a second ~90mm scope as well, and this WO is something i think about, but i agree, why it will be that much expensive, i saw it in one site for about $2062, not bad price, but i still waiting for the final confirmation price, then i can decide if i will go with that or something else, i can wait and see.

 

I was hoping that Astronomics Astro-Tech AT 92mm is less than $1500, and more i wish if it has FPL-53 optics, but sounds it is just more expensive with ED good quality optics but not FPL-53, so i won't pay that much if it isn't having FPL-53 or better like Fluorite, i will accept FPL-55 at least, FCD-100 is in same league, anything else i think i shouldn't risk, unless some can show me results from that AT92 with no colors issues without heavy processing, and i mean RGB results.

FPL 53, FPL 55, FCD-100, are all almost the same, you are not going to find a difference there (the mating elements are also very important, think about Takahashi FC100DZ for example) but after having had and used some of the best refractors that have been made, I arrived to the conclusion, many years ago, that the most important factor is the manufacturer. For example, TEC had a 160ED with FPL 51, and I would prefer that telescope to anything made with FPL 53 from other "not hight level" manufacturer.

 

IMO talking about refractors high level are for example AP, TEC, CFF, LZOS, Takahashi, Nikon, Pentax, ARIES, Vixen fluorites, and some others...(WO did a 110mm with TEC lenses that was really good)

 

I am not going to pay more than 1500€ for a new 90mm refractor from a different manufacturer than those listed above, anyway that is my opinion, others can be different.

 

So if I had to choose between this:

http://www.unitronit...ID=WOFLT91SGRP3

 

And this:

https://www.teleskop...ertificate.html

 

To me the decision is very easy.

 

Regards

Jose


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#59 awong101

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Posted 15 November 2020 - 03:00 PM

From William Optics' Facebook page...

Attached Thumbnails

  • WO F91 Price.JPG

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#60 Tyson M

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Posted 15 November 2020 - 03:01 PM

From William Optics' Facebook page...

I love that color scheme- Titanium.   Looks great



#61 skysurvey

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Posted 15 November 2020 - 03:05 PM

From William Optics' Facebook page...

Under $2K, so what is wrong here?

http://www.unitronit...ID=WOFLT91SGRP3



#62 mightynate

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Posted 15 November 2020 - 03:06 PM

https://www.cyclopso...t-91-f-5-9-apo/

 

D 91mm

f 5.9

FL 536.9 mm 

 

HK$15,980.00  is about $US 2,061.02 



#63 skysurvey

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Posted 15 November 2020 - 03:13 PM

FPL 53, FPL 55, FCD-100, are all almost the same, you are not going to find a difference there (the mating elements are also very important, think about Takahashi FC100DZ for example) but after having had and used some of the best refractors that have been made, I arrived to the conclusion, many years ago, that the most important factor is the manufacturer. For example, TEC had a 160ED with FPL 51, and I would prefer that telescope to anything made with FPL 53 from other "not hight level" manufacturer.

 

IMO talking about refractors high level are for example AP, TEC, CFF, LZOS, Takahashi, Nikon, Pentax, ARIES, Vixen fluorites, and some others...(WO did a 110mm with TEC lenses that was really good)

 

I am not going to pay more than 1500€ for a new 90mm refractor from a different manufacturer than those listed above, anyway that is my opinion, others can be different.

 

So if I had to choose between this:

http://www.unitronit...ID=WOFLT91SGRP3

 

And this:

https://www.teleskop...ertificate.html

 

To me the decision is very easy.

 

Regards

Jose

Please note, that my high end refactor list was not intended to be exhaustive, there are others good telescopes out there, for example I have had a Televue76 and a Vixen ED81SD, both of them were formidable instruments (although my Takahashi FC76DS was a step above).


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#64 skysurvey

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Posted 15 November 2020 - 03:36 PM

https://www.cyclopso...t-91-f-5-9-apo/

 

D 91mm

f 5.9

FL 536.9 mm 

 

HK$15,980.00  is about $US 2,061.02 

Yes I know it, and it makes more sense.

 

To my knowledgement if you want to make a 90mm refractor for example, you need something like a raw blank dimension of 93-95mm more or less.  In order to avoid some edge problem, you would prefer to close the clear aperture to 90mm, so I think the WO91mm and the TS90mm are the same telescope from the same manufacturer, and WO is taking more risk with a 91mm refractor than with a 90mm, or the manufacturer is cherry picking the batches for them, or something similar, I may be wrong, I would like to know it for sure, but it is not the case.

 

So as I think both telescopes are the same, if I buy one it will be the less expensive. Anyway I am not doing this right now, so I have time to investigate.

 

But, whom am I trying to deceive?, at the end I will choose something like a Takahashi FC100D (C, F or Z) a CFF 92mm or a LZOS 105mm laugh.gif  if my wife allow me (i bought her an iPhone SE last week to try to pave the way flowerred.gif ) Ummm forget this, it is only a joke (or not?), I think these new triplets form China or other countries are good telescopes. I really want to try one.


Edited by skysurvey, 15 November 2020 - 03:38 PM.

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#65 TareqPhoto

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Posted 15 November 2020 - 03:37 PM

Please note, that my high end refactor list was not intended to be exhaustive, there are others good telescopes out there, for example I have had a Televue76 and a Vixen ED81SD, both of them were formidable instruments (although my Takahashi FC76DS was a step above).

Understood, it is just i prefer to be sure anyway, and most of the time what i read around even the votes ae going to FPL-53 scopes from not known high end brands, so it is likely the safe side is to have FPL-53 scope then later think about its design quality.

 

I can't judge any scope until i see results, i ordered this 90mm FPL55 APO as my first ever triplet refr, i doubt it will be any worse than many cheap APO doublets or triplets around, and because i don't know about it i thought that FPL-55 is a better or an upgrade version of FPL-53, and i followed a logic here as there is FPL-51 less than FPL-53, so i thought 55 should go better, but sounds that FPL-53 is very very slightly an edge, i will try to forget that and use the scope once it arrives to its best i can, and hope to get a second [Red] scope of same or similar specifications [90-100mm aperture of 500-570mm focal length].


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#66 skysurvey

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Posted 15 November 2020 - 03:54 PM

Understood, it is just i prefer to be sure anyway, and most of the time what i read around even the votes ae going to FPL-53 scopes from not known high end brands, so it is likely the safe side is to have FPL-53 scope then later think about its design quality.

 

I can't judge any scope until i see results, i ordered this 90mm FPL55 APO as my first ever triplet refr, i doubt it will be any worse than many cheap APO doublets or triplets around, and because i don't know about it i thought that FPL-55 is a better or an upgrade version of FPL-53, and i followed a logic here as there is FPL-51 less than FPL-53, so i thought 55 should go better, but sounds that FPL-53 is very very slightly an edge, i will try to forget that and use the scope once it arrives to its best i can, and hope to get a second [Red] scope of same or similar specifications [90-100mm aperture of 500-570mm focal length].

Talking about telescopes, and forgetting other things involved, FPL53 is better than FPL51, but FPL 55 is almost identical to FPL53:

http://www.oharacorp...L55-2020-06.pdf

http://www.oharacorp...L53-2020-06.pdf

 

You can see, talking about the important Abbe number that FPL53 VS FPL55 is 94,93 VS 94,66, a really small difference. There are other things to consider (one of them you are not going to find it inside the tables, it is related to the easiness to polish the lenses, an important thing to the manufacturers), but in general that are almost the same on first consideration. But note that the Abbe number of FPL 51 is only 81.54:

http://www.oharacorp...L51-2020-06.pdf


Edited by skysurvey, 15 November 2020 - 03:55 PM.


#67 TareqPhoto

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Posted 15 November 2020 - 04:04 PM

Talking about telescopes, and forgetting other things involved, FPL53 is better than FPL51, but FPL 55 is almost identical to FPL53:

http://www.oharacorp...L55-2020-06.pdf

http://www.oharacorp...L53-2020-06.pdf

 

You can see, talking about the important Abbe number that FPL53 VS FPL55 is 94,93 VS 94,66, a really small difference. There are other things to consider (one of them you are not going to find it inside the tables, it is related to the easiness to polish the lenses, an important thing to the manufacturers), but in general that are almost the same on first consideration. But note that the Abbe number of FPL 51 is only 81.54:

http://www.oharacorp...L51-2020-06.pdf

You know, for us non English-based language, it is difficult to understand the meaning and origin of those indexing and serial numbers by manufacturers, i sometimes neglect those numbers if i can't get around it to understand, i just look at what people are posting around to get the idea, and sounds triplets and FPL-53 is the top choice everywhere, talking about non high end here, i was going to order Takahashi FS-60 which has Fluorite, all said that Fluorite outperform FPL-53, but the scope itself is a doublet, so it is like a doublet vs. triplet or Fluorite vs. FPL-53, can't afford very expensive scope with ether FL or FPL-53 anyway, i just saw this TS 90mm FPL-55 around and i thought maybe this is a new thing, i ordered it and forgot that it will be available by next year, just have to wait.

 

I am still shopping around for second scope for my dual imaging system, and i like to stay within same specification of same scope/camera combo, i am done with cameras, now time with scope, for narrowbanding i don't have issue to buy anything as it won't be a big issues with NB filters mostly with my 3nm ones, but with LRGB, i think i better stay with safe side and have better color corrected scope to match this TS 90, i will wait and see what will be out, and this WO 91 is a bit expensive to be honest even at $2000, but if there aren't much options around i can go with then maybe i have no choice.


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#68 skysurvey

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Posted 15 November 2020 - 04:05 PM

Talking about telescopes, and forgetting other things involved, FPL53 is better than FPL51, but FPL 55 is almost identical to FPL53:

http://www.oharacorp...L55-2020-06.pdf

http://www.oharacorp...L53-2020-06.pdf

 

You can see, talking about the important Abbe number that FPL53 VS FPL55 is 94,93 VS 94,66, a really small difference. There are other things to consider (one of them you are not going to find it inside the tables, it is related to the easiness to polish the lenses, an important thing to the manufacturers), but in general that are almost the same on first consideration. But note that the Abbe number of FPL 51 is only 81.54:

http://www.oharacorp...L51-2020-06.pdf

By the way, the fluorite Abbe number is 94,99, very close to FPL53 (94.93) and to FPL55 (94.66). There are other differences that experts could explain (by no means I consider myself an expert, I am a person who likes to read technical articles and who likes to try different telescopes, so I buy and sell whenever I can)


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#69 skysurvey

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Posted 15 November 2020 - 04:27 PM

You know, for us non English-based language, it is difficult to understand the meaning and origin of those indexing and serial numbers by manufacturers, i sometimes neglect those numbers if i can't get around it to understand, i just look at what people are posting around to get the idea, and sounds triplets and FPL-53 is the top choice everywhere, talking about non high end here, i was going to order Takahashi FS-60 which has Fluorite, all said that Fluorite outperform FPL-53, but the scope itself is a doublet, so it is like a doublet vs. triplet or Fluorite vs. FPL-53, can't afford very expensive scope with ether FL or FPL-53 anyway, i just saw this TS 90mm FPL-55 around and i thought maybe this is a new thing, i ordered it and forgot that it will be available by next year, just have to wait.

 

I am still shopping around for second scope for my dual imaging system, and i like to stay within same specification of same scope/camera combo, i am done with cameras, now time with scope, for narrowbanding i don't have issue to buy anything as it won't be a big issues with NB filters mostly with my 3nm ones, but with LRGB, i think i better stay with safe side and have better color corrected scope to match this TS 90, i will wait and see what will be out, and this WO 91 is a bit expensive to be honest even at $2000, but if there aren't much options around i can go with then maybe i have no choice.

I don't know what have you heard about doublets, but I can sure you that both Takahashi and Aries can build a visual doublet fluorite refractor that is as good as the best FPL53 triplet you can find.

 

In some cases (Takahashi FC100DZ) you would have to look for exotic examples to find an small but appreciable difference on the paper, that IMHO you are not going to be able to distinguish when looking through the telescopes (if we are going to talk about astrophotography there are other considerations involved)

 

Here you have some of the 4" exotic examples:

Astro-Opitk FLT 105/1000

https://www.astro-th..._web.1200x0.png

 

Or the new APQ Polychromats:

https://apq.de/en/po...s.htm?tab=0#tpl


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#70 skysurvey

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Posted 15 November 2020 - 04:33 PM

You know, for us non English-based language, it is difficult to understand the meaning and origin of those indexing and serial numbers by manufacturers, i sometimes neglect those numbers if i can't get around it to understand, i just look at what people are posting around to get the idea, and sounds triplets and FPL-53 is the top choice everywhere, talking about non high end here, i was going to order Takahashi FS-60 which has Fluorite, all said that Fluorite outperform FPL-53, but the scope itself is a doublet, so it is like a doublet vs. triplet or Fluorite vs. FPL-53, can't afford very expensive scope with ether FL or FPL-53 anyway, i just saw this TS 90mm FPL-55 around and i thought maybe this is a new thing, i ordered it and forgot that it will be available by next year, just have to wait.

 

I am still shopping around for second scope for my dual imaging system, and i like to stay within same specification of same scope/camera combo, i am done with cameras, now time with scope, for narrowbanding i don't have issue to buy anything as it won't be a big issues with NB filters mostly with my 3nm ones, but with LRGB, i think i better stay with safe side and have better color corrected scope to match this TS 90, i will wait and see what will be out, and this WO 91 is a bit expensive to be honest even at $2000, but if there aren't much options around i can go with then maybe i have no choice.

And if you want to buy the best of the best visual 60mm refractor, try the Takahashi FOA60 (Takahashi FS 60 and Sky 90 are good scopes, but they are not at the same level than the rest of their refractors, I have had both of them).


Edited by skysurvey, 15 November 2020 - 04:34 PM.

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#71 TareqPhoto

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Posted 15 November 2020 - 05:03 PM

I am only buying for astrophotography, so imaging not visual, for visual i do everything from my yard so i don't have to buy very compact small scope for that, i am planning to buy a big dobsonian aperture, so that will put me in the right path for amazing visual, i now just think about DSO imaging and thus i care about good refr to give me nice results at great quality and affordable lower prices.



#72 TareqPhoto

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Posted 15 November 2020 - 05:05 PM

There is a scope that has FPL-53 and FPL51 and Lanthanum all together, does it means it crank the quality that much? i mean many scopes they mentioned they have 3 optics if they are triplets and only mention one high quality glass either FPL-53 or FCD-100 or even Fluorite, so what about the other two optics then? I don't know what all those optics in this WO 91 but only mentioned FPL-53, i doubt that all the three optics are FPL-53 anyway, all they say FPL-53 representing to ALL three optics anyway?!!!



#73 Pauls72

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Posted 24 January 2021 - 12:38 PM

If I recall, maybe 10-12 pounds loaded up, I could be off though. At f6.3 it was pretty compact and an excellent performer

The FLT-98 is 13.83 lbs. I have one and it's a wonderful scope. I never understood why they discontinued it. But that seems to be a common practice of W.O. to discontinue a model and come out with something new.



#74 javawolfpack

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Posted 30 January 2021 - 04:32 PM

"Start shipping to worldwide dealers around Feb 18" from their FB page. 

 

They posted an update 2 days ago with new promotional photo:
https://www.facebook.../williamoptics/



#75 AZ49

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Posted 27 February 2021 - 06:05 PM

Just placed an order for one. Coming next week. Here is a pic of it that William sent me, and also another one beside the upcoming 120mm FLT. The 91mm looks small beside it. 

  

Attached Thumbnails

  • 6CDFFAF1-418E-4AB5-93B6-106E0322FA4C.jpeg
  • ECE6E296-5BDD-4F62-9EBA-5671AB0A3C1A.jpeg

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