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Borg 125SD

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#1 teelgul

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Posted 29 September 2013 - 11:07 PM

Hi All

Hows the optics of this Doublet compared to TAKs, as Borg says its a Pentax made objective ?Since the basic scope is an F/6 which focuser option will be good for purely
visual use especially widefield ?
I am on the TEC 110 list but as its production is uncertain and since light weight/portability is a must i am keeping this as an option along with the yet to be released vixen 100.
Any suggestions?
Regards
Ganesh

#2 MooEy

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Posted 30 September 2013 - 12:10 AM

I have one and i like it alot.

#3 skullpin

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Posted 30 September 2013 - 04:13 AM

I too have one and love it. I have never looked through a Tak to compare, though I previously had a new model NP127is. The Borg is definitely more colorful on bright stars, though is just as sharp on planets. By colorful, I mean Vega inside and outside of focus, or when thermally challenged. In focus, color control is quite good for an f/6 doublet.

The Borg is actually lighter than the TEC 110, 3.5 vs 4.5 kg. The Borg is a fair bit larger than the TEC though, about 700mm vs 482mm. The Borg has a substantial aperture advantage over either the TEC or the Vixen.

The 2" Feathertouch is the way to go for visual; it has 1.5" travel vs 0.8" for the M57 version.

Keith

#4 teelgul

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Posted 30 September 2013 - 05:59 PM

Thanks for the feedback.
regards
Ganesh

#5 Paulimer

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Posted 30 September 2013 - 08:16 PM

I personally don't like the drawtube design, so I'm using a moonlite on my 125SD for AP. The option may not be ideal for visual coz it adds redundant weight. But with that I can attach a TS2.5 flattener or a Borg #7870 0.7x reducer/flattener to it.

I haven't tried it extensively on visual performance, but I sincerely love the view it gives during the brief sessions.

Paul

#6 Stellarfire

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Posted 03 October 2013 - 03:06 PM

Beat Kohler of AOK Swiss uses the Borg 125SD to build the "HARUKA" Double Refractor, fitted with Matsumoto EMS 2" image erecting mirrors.

Prices:
Borg 125SD "Haruka" with 2" Feather Touch Focuser CHF 12,846.00 / € 9,749.00
Borg 125SD "Haruka" with 3" Feather Touch Focuser CHF 13,952.00 / € 10,589.00

Nice toy, isn't it?


Stephan

#7 teelgul

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Posted 04 October 2013 - 03:52 AM

Certainly it is! Thanks for the good info
Regards
Ganesh






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