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Borg 107FL f/5.6 fluorite doublet coming

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#1 Mark9473

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Posted 15 March 2016 - 10:58 AM

See here: http://www.aokswiss....uebersicht.html


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#2 nicknacknock

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Posted 15 March 2016 - 12:03 PM

Some more info here from Hutech.



#3 junomike

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Posted 15 March 2016 - 01:24 PM

My understanding is this was/is a prototype.  Has that changed?

 

Mike



#4 nicknacknock

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Posted 15 March 2016 - 01:34 PM

Mike,

 

It will become commercially available sometime this year.

 

The post I linked to mentions this bit, but no mention of price just yet.



#5 Alvin See

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Posted 15 March 2016 - 01:53 PM

Using the price of the 90FL as reference, this one is not going to be cheap.



#6 nicknacknock

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Posted 15 March 2016 - 02:25 PM

Yup, not for the faint hearted that's for sure!

#7 Jobryant

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Posted 15 March 2016 - 04:01 PM

Time to start saving my money.  Hope Borg releases my info and specs soon.  This scope had most definitely has peaked my interest. 



#8 Ricky

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Posted 15 March 2016 - 05:54 PM

Borg is expensive!  My Borg 55L (fluorite doublet) cost me $750...no rings included :crazy:   But I do really like it!



#9 StarDust1

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Posted 20 March 2016 - 06:04 AM

Here is more pictures of the Borg 107FL:

 

http://livedoor.blog.../c/0cca0655.jpg

http://www.borg-nikki.com/?p=2780

https://digiborg.wor...-and-55fl-f3-6/

 

 

The tube looks like it's made from carbon fiber. And the Borg 107FL looks like a big tele lens  ;)



#10 nicknacknock

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Posted 20 March 2016 - 06:21 AM

Stick a 2" FTF at the back end, lose the helical focuser, get 2 80mm Borg lightweight rings and a dovetail and it should be a very lightweight 4+" apo refractor...



#11 AnakChan

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Posted 20 March 2016 - 08:47 PM

 

My understanding is this was/is a prototype.  Has that changed?
 
Mike

Mike,
 
It will become commercially available sometime this year.
 
The post I linked to mentions this bit, but no mention of price just yet.

 

It's my understanding that it'll be released in summer (at least in Japan, don't know about overseas). No price yet even in the latest Borg brochure.

 

P2270036.jpg

P2270037.jpg

IMG.jpg


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#12 Ava

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Posted 21 March 2016 - 02:14 AM

Thank you AnakChan, very informative! Is it the carbon fiber tubes in the lower right of the product brochure you posted, also available by summer?



#13 nicknacknock

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Posted 21 March 2016 - 02:21 AM

AnakChan,

 

Ted Ishikawa ships worldwide so there is no concern about availability in specific countries. Plus he is very responsive to emails  :grin:



#14 AnakChan

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Posted 21 March 2016 - 08:43 AM

AnakChan,

 

Ted Ishikawa ships worldwide so there is no concern about availability in specific countries. Plus he is very responsive to emails  :grin:

 

I met him. A very nice chap! I was lining up in the Borg booth and when I said I spoke really bad Japanese, the booth attendant introduced me to Ted. Good to see that he ships worldwide.


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#15 KaStern

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Posted 21 March 2016 - 05:51 PM

Hi folks,

 

600mm f.l. would be a nice refractor to complement my other scopes.

I wonder if it will be not too fast to be really good enough to me...

However. I want to have a look through it.

 

Cheers, Karsten


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#16 nicknacknock

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Posted 22 March 2016 - 01:07 AM

Well, I fired off an email to Ted asking if there's any more information to share but he tightened up like a clam  :grin:  :lol: !

 

Which makes sense really as the scope is still work in progress, but I was hoping to get some juicy details (a bone or two even) - I am VERY interested in the weight and length of the scope for visual configuration with a 2" FTF....


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#17 areyoukiddingme

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Posted 22 March 2016 - 01:55 AM

I have been tempted to replace my 80mm and 101mm with a good 90. But if this 107 is as light as I think it will be, then that would be an even better prospect. But at what cost. I'm guessing configured for visual with a good focuser is going to be close to 3.5k. 



#18 nicknacknock

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Posted 22 March 2016 - 02:02 AM

I have been tempted to replace my 80mm and 101mm with a good 90. But if this 107 is as light as I think it will be, then that would be an even better prospect. But at what cost. I'm guessing configured for visual with a good focuser is going to be close to 3.5k. 

 

Ah, but the closer you get to perfection - fluorite, lightweight, reasonable aperture - the more expensive it gets.

 

I am itching to learn the price. My mind was set more or less on a TSA120 this year but this may change my mind. Yes, 107 Vs 120m but light as a feather Vs middleweight (the TSA is relatively light for the aperture but still)...



#19 Ava

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Posted 22 March 2016 - 03:01 AM

I'm looking at this as potentially the ultimate travel scope (and of course wonderful wide field while at home). Together with the new carbon fiber tube parts, it could be very light indeed! But yes, the cost has me concerned as well.



#20 Niklo

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Posted 22 March 2016 - 10:40 AM

Hi,

the question is how good is such a fast Fluorite doublet?

How good is the colour correction and how expensive is such a telescope.

I have a Vixen Fl102s (4" f/9). This has good optics with nice colour correction, light weight.

The advantage of 600mm f.l. would be wide field views but I don't know how good this fast fluorites are.

Clear skies,

  Roland



#21 MooEy

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Posted 22 March 2016 - 10:48 AM

Don't look at the price, just buy.

My biggest regret in life is to look at the price and not buying the 76ed when I started the hobby. I bought something else that was "more value for money". That "more value for money" scope eventually became quite useless when better scopes came along. Even today, the 76ed is still a very usable scope due to it's light weight and versatility. Even if one decides that the optics aren't worth using, the rest of the parts can still be used to build another scope.

~MooEy~

#22 areyoukiddingme

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Posted 22 March 2016 - 12:19 PM

Largely comes down to price for me too. I certainly don't need one, but it looks like an almost perfect combination of features.

 

I'm sure the optical quality will be outstanding, and the extreme light weight means it would fill the role of grab and go, travel scope, and accompany my larger reflectors on trips. That means I could sell my c6 which is my dedicated travel scope, as well as my two small refractors.

 

And to make things 'worse', I will be attending a conference in Fukuoka in June. . . if it is released by then and I can see one in the flesh, it might be hard to resist the temptation!



#23 Mark9473

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Posted 22 March 2016 - 03:08 PM

the question is how good is such a fast Fluorite doublet?

How good is the colour correction and how expensive is such a telescope.

 

It's safe to say it won't match the colour correction of a slower scope. It will have a lot of field curvature too. If there weren't these trade-offs, everybody would be making such fast scopes. But if you must have the lightest weight refractor for wide-field viewing, this is a strong contender. I'm speculating, but it may well be lighter and more compact (in travel format) than many of today's 80 mm scopes.



#24 bb4

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Posted 24 March 2016 - 07:01 AM

 

the question is how good is such a fast Fluorite doublet?

How good is the colour correction and how expensive is such a telescope.

 

It's safe to say it won't match the colour correction of a slower scope. It will have a lot of field curvature too. If there weren't these trade-offs, everybody would be making such fast scopes. But if you must have the lightest weight refractor for wide-field viewing, this is a strong contender. I'm speculating, but it may well be lighter and more compact (in travel format) than many of today's 80 mm scopes.

 

 

 

Yes, there is field curvature and there is a very small amount of false color, but the image is still very very pleasing.  Tack sharp out to the edge, and I personally don't really notice the field curvature much, except when viewing the moon.

 

The fit and finish of my BORG 90FL is superb.  I love the retractable dew shield, its very short length, and its weight.  With rings, an arca swiss dovetail, a lightweight FT 2" focuser, and some Borg and T2 adapters, the scope weighs well under 5 pounds.

 

That the new 107 will be a F5.6 tends to indicate that the field flattener they introduced will be compatible with this new entry as well.

 

Britt

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Edited by bb4, 24 March 2016 - 07:02 AM.


#25 mlanglois

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Posted 24 March 2016 - 10:56 AM

BB4,

 

How do you like the 90FL on the prototype Hitchhiker? I use mine on a FTQ and while it works well I thought that would be the lower limit for stability. If the Hitchhiker is stable with that scope, then Charles will be getting more of my money.

 

Also, could you tell me what rings and what model Feathertouch you are using?

 

Thanks,

Michael




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