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MDieterich
super member


Reged: 12/12/07

Loc: Pittsburgh, PA
Opinions on the Boren-Simon F/2.8 Newt Astrograph
      #4242868 - 12/11/10 05:46 PM

Hi all,

I was looking to move up from my modified Canon Xsi to CCD for narrowband work here outside Pittsburgh, PA. I recently discovered this scope and wanted people opinions on it for DSLR and CCD imaging in light polluted skies.

http://www.powernewts.com/

Thanks,

Matthew F. Dieterich

Sophomore-Robert Morris University-Environmental Science


Check out my Astro-imaging site below
http://www.pbase.com/mdieterich


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Tal Fibish
member


Reged: 12/04/10

Loc: Israel
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: MDieterich]
      #4245134 - 12/12/10 10:03 PM

Hi Matthew,

I took a demo unit out for two nights in November, and I liked it very much.

It is simple to set up and I didn't have to collimate it the first night. The second night I had to collimate it. I think it was a big bump in the road in the morning before that shook the telescope and I needed to collimate it a little (the primary mirror).

I was afraid of the focus and I thought it can be difficult to focus on such short focal ratio, but actually focusing was very quick. After I did flats in the first night, and before I took out the camera, I locked the focus knob on the focuser, and when I started the second night, I did not need to do any focus, till the morning. It just stayed locked.

If you are imaging with a focal ratio of F4 or more, it is really surprising how quickly the dim objects come out. A little bit like magic… This is a special experience.

I am working on one of the processing and will show it here soon.
When I get my unit I will tell you too.
I hope this was helpful.

Tal


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astrosharp
sage


Reged: 06/24/08

Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: Tal Fibish]
      #4245947 - 12/13/10 11:19 AM

Good question! I am also interested to learn more about these scopes. Anyone in the UK got one?

Ian.


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Harel_Boren
Vendor-The Boren-Simon PowerNewt Astrograph


Reged: 03/15/09

Loc: Israel
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: astrosharp]
      #4246551 - 12/13/10 04:06 PM

Guys,

Both of us founders (Boren and Simon) will be happy to answer any questions you may have - here, over email or over skype.

We love the scopes, we love the hobby, and we'll love to shed light - lots of light - on any topic related to it.

Just ask :-)

Cheers,
Harel


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fetoma
Carpal Tunnel
*****

Reged: 09/26/06

Loc: Southern New Jersey
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: Harel_Boren]
      #4246642 - 12/13/10 04:50 PM

Harel,

Will you make a version that will have an image circle to cover a full 35mm chip size?


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MDieterich
super member


Reged: 12/12/07

Loc: Pittsburgh, PA
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: fetoma]
      #4247296 - 12/13/10 10:18 PM

Some great questions being asked here guy thanks!

Tal I am very eager to see your image please post it to this thread when your a done! =)

Cheers ,


Matt


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Harel_Boren
Vendor-The Boren-Simon PowerNewt Astrograph


Reged: 03/15/09

Loc: Israel
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: fetoma]
      #4247715 - 12/14/10 06:14 AM

Quote:

Harel,

Will you make a version that will have an image circle to cover a full 35mm chip size?




Hi Frank,

Thanks for this question.
We have been contemplating this, but had eventually voted against it, as it would require too significant changes to be made to the optics and the tubes, which would have made the system far more expensive.

Our partners ASA of Austria carry excellent top-most quality instruments, which do cover a full 35 mm chip, and I'd be delighted to facilitate direct contact if you like.

Please don't hesitate to ping us with any questions on the scope.

Cheers,
Harel


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jmasin
Carpal Tunnel


Reged: 12/22/08

Loc: Murphy, TX (DFW)
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: Harel_Boren]
      #4247977 - 12/14/10 10:40 AM

Harel,

I have a Q as I've been intrigued by the offering.

It says on the website "can be used as an F/4 (corrector out)". Are there any options for a slightly longer focal length that is still coma-corrected?


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Harel_Boren
Vendor-The Boren-Simon PowerNewt Astrograph


Reged: 03/15/09

Loc: Israel
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: jmasin]
      #4248385 - 12/14/10 02:20 PM

Hi Jon, and thanks for this question.

The Powernewt can indeed be used at larger focal ratios:
- by not using the PRC: F/4
- by adding any barlow: >F/4

We believe that at larger focal ratio's coma will be hardly visible. However, at any F ratio between F/4 to F/6 we recommend the Baader Planetarium Multi Purpose Coma Corrector (or MPCC for short), with which we have very positive experience (its retail price is about $150).

Please don't hesitate to ping us with any questions on the scope.

Cheers,
Harel


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jmasin
Carpal Tunnel


Reged: 12/22/08

Loc: Murphy, TX (DFW)
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: Harel_Boren]
      #4248723 - 12/14/10 04:59 PM

great thanks, so a standard CC works in place of the one that the scope ships with. That's what I wanted to know.

Thanks!


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Tal Fibish
member


Reged: 12/04/10

Loc: Israel
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: jmasin]
      #4250319 - 12/15/10 01:05 PM

Matt,
I quickly processed the M45 data from two weeks ago that I took with the demo unit from Powernewt.
I used my old camera - Orion SS Color V2 , because I was afraid that the SBIG STL-11000M might be to heavy for it.

I must say I was supprised to see how much data I got with only 30 min exposure , I use to image with slow F/6.3 telescope.

anyway , that a look :
http://www.pbase.com/faibisht/image/131160871


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MDieterich
super member


Reged: 12/12/07

Loc: Pittsburgh, PA
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: Tal Fibish]
      #4250780 - 12/15/10 05:10 PM

Tal my goodness that image is simply beautiful! How long have you been imaging? Where in Israel did you image M45 from. I live in light polluted suburbs and am kind of weary of imaging at F/2.8 with my modified Canon Xsi. I do have the Astronomik CLS light pollution filter though.

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MDieterich
super member


Reged: 12/12/07

Loc: Pittsburgh, PA
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: MDieterich]
      #4250811 - 12/15/10 05:25 PM

Tal also could you explain how you guide with the powernewt. I have a ST80mm on a Losmandy plate on my current setup (click my link, then equipment). Can I use this guidescope setup with the Powernewt without further accessories?

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David PavlichAdministrator
Transmographied
*****

Reged: 05/18/05

Loc: Mandeville, LA USA
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: MDieterich]
      #4251523 - 12/15/10 11:33 PM

Hey Mathew...I have my PowerNewt set up with a pair of Parallax rings. It makes mounting my Mini Borg guidescope easy. I just mount a short Losmandy universal dovetail plate on the top of the rings. It works very well.

The only sort of negatives are that the Parallax rings are a bit heavy and they aren't cheap. However, the fit and finish of the Parallax rings makes mounting the scope a breeze!

David


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Gary BEAL
Carpal Tunnel
*****

Reged: 05/10/03

Loc: New Zealand
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph new [Re: David Pavlich]
      #4251608 - 12/16/10 01:28 AM

Matthew, I don't have the scope that this thread talks about, but have a distant cousin, the AT8" IN. I have used a converted 50mm finder, with the eye lens substituted by the Lodesar, and sitting on top using an ADM Vixen style rail, and ADM Vixen saddles, and ADM finder rings. Wonderful setup.
As soon as I get the ADM saddle mounted permanently on the mount I will attach the finder/guider directly to one side of the saddle, and this will mean the scope (any scope) that is in the saddle also has the finder/guider aligned.
To put extra weight and drag on top just doesn't make sense to me.
Gary


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kfir Simon
Vendor-PowerNewt


Reged: 09/21/10

Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph [Re: Gary BEAL]
      #4251666 - 12/16/10 03:31 AM

Tal - Amazing outcome! - well done.
30 min on F2.8 indeed delivers.

Cheers,

Kfir


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Tal Fibish
member


Reged: 12/04/10

Loc: Israel
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph [Re: kfir Simon]
      #4251741 - 12/16/10 06:47 AM

Matt,
I'm imaging for about 2 years now and imaging from the Negev desert in Israel , its very very dark place with no light pollution at all. most of the astrophotographers in Israel imaging in the negev desert , its the darkest place in the country.
for guiding I usually use a smaller refractor (WO ZS70) but in this case I used my old finder that I modified for guiding.

Tal.


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MDieterich
super member


Reged: 12/12/07

Loc: Pittsburgh, PA
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph [Re: Tal Fibish]
      #4252029 - 12/16/10 11:09 AM

Hi guys,

So the consensus is to get a small finderscope? I already have the Orion ST80mm Guidescope package with Starshoot Autoguider. How would I attach that to the PowerNewt? What other costs/accessories would I need to get up and running? I want to minimize tube flex most importantly.

Also Tal I live in light polluted skies. Am I going to have trouble imaging at such a high F/Ratio with the PowerNewt? I have the Astronomik CLS light pollution filter for my modified Canon Xsi.


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Gary BEAL
Carpal Tunnel
*****

Reged: 05/10/03

Loc: New Zealand
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph [Re: MDieterich]
      #4252850 - 12/16/10 05:52 PM

Can't help you with the LP, but the gut feeling I have with the ST80 (I started with one, so know it well) is the simpler option of an old finder is better.
If you can, get one that fits a "foot" like the already installed finder, and have "one each side", thereby assisting with balance.
My main concerns with the ST80 were the tube rings, and the focuser, mainly the focuser. Any movement here is detrimental to the cause.
Try cobbling together a finder-scope guider, you will be impressed.
Shoot me an e mail off group if you need help.
Gary


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David PavlichAdministrator
Transmographied
*****

Reged: 05/18/05

Loc: Mandeville, LA USA
Re: Opinions on the Boren-Simon F/2.8 Newt Astrograph [Re: MDieterich]
      #4253354 - 12/16/10 09:40 PM

Here's a picture of my PowerNewt. I apologize for the lack of quality of image, but it should give you somewhat of an idea how it looks:

[image][/image]

David


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