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kfir Simon
Vendor-PowerNewt


Reged: 09/21/10

Finally a Horsehead without huge spikes! new
      #5626359 - 01/16/13 03:08 PM Attachment (56 downloads)

Another year and again I couldn't resist imaging this beautiful region.
This time, using the curved spider, I had very high hopes to get an image without the HUGE spike of Alnitak dominating the frame.
For the first time, I could see what lies under the glare of Alnitak.
I'm VERY happy with this modification of the scope!

Hope you agree with me...

Kfir

Larger version here:
http://www.pbase.com/tango33/image/148357402


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alpal
Post Laureate


Reged: 06/15/09

Loc: Melbourne Australia.
Re: Finally a Horsehead without huge spikes! new [Re: kfir Simon]
      #5626379 - 01/16/13 03:16 PM

It looks great Kfir.
I like that modification - it's a big improvement.

cheers
Allan


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CJK
professor emeritus


Reged: 12/05/12

Loc: Northeast TN
Re: Finally a Horsehead without huge spikes! new [Re: kfir Simon]
      #5626387 - 01/16/13 03:22 PM

That's just jaw-droppingly fabulous!!

-- Chris


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Leonardo70
Pooh-Bah


Reged: 04/16/09

Loc: Turin - Italy
Re: Finally a Horsehead without huge spikes! new [Re: CJK]
      #5626564 - 01/16/13 04:42 PM

Really nice.

All the best,
Leo


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rigel123
Postmaster
*****

Reged: 06/29/09

Loc: SW Ohio
Re: Finally a Horsehead without huge spikes! new [Re: kfir Simon]
      #5626709 - 01/16/13 06:08 PM

Terrific Kfir, Alnitak looks great! Those new vanes are definitely keepers.

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Mike Wiles
scholastic sledgehammer


Reged: 02/04/09

Loc: Goodyear, AZ
Re: Finally a Horsehead without huge spikes! new [Re: rigel123]
      #5626963 - 01/16/13 08:33 PM

Sooo.....it makes you wonder if/when people who don't have the last name Borel or Simon are going to be able to order/buy one of these. I love the idea of a ridiculously fast Newtonian. I've looked long and hard at the PowerNewts as well as the pricier offerings from AG Optical and ASA. I just can't get past the huge diffraction spikes that show up in the images....or I'd probably have one already.

Now a 12" f/2.8 Newtonian with a carbon fiber tube and curved vane spider....& feathertouch focuser mated to my ST-8300 & filters would be a match made in heaven for my typical seeing conditions.

Very nice image Kfir. It's one more reason to give the Powernewts serious consideration.

Mike


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turk123
Carpal Tunnel
*****

Reged: 07/09/10

Loc: N.E. Ohio
Re: Finally a Horsehead without huge spikes! new [Re: Mike Wiles]
      #5626991 - 01/16/13 08:45 PM

One word: Spectacular!

Amazing Job!


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David PavlichAdministrator
Transmographied
*****

Reged: 05/18/05

Loc: Mandeville, LA USA
Re: Finally a Horsehead without huge spikes! new [Re: kfir Simon]
      #5627153 - 01/16/13 10:32 PM

More good stuff, Kfir!!

David


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David Ault
sage


Reged: 09/25/10

Loc: Georgetown, TX
Re: Finally a Horsehead without huge spikes! new [Re: David Pavlich]
      #5627236 - 01/16/13 11:38 PM

Looks great Kfir!

Regards,
David


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Raginar
Postmaster
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: Finally a Horsehead without huge spikes! new [Re: David Ault]
      #5627321 - 01/17/13 01:10 AM

Kfir, do you notice the spider acting as a spring or any collimation issues? Some of the DIY guys around here have used some of the replacement spiders and noted they did not provide a solid connection for the secondary.

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Cristina Cellini
sage


Reged: 08/11/12

Loc: Ravenna, Italy
Re: Finally a Horsehead without huge spikes! new [Re: Raginar]
      #5627682 - 01/17/13 09:22 AM

Great image!

Cristina


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steve leshin
sage


Reged: 04/28/08

Loc: Sedona, Az
Re: Finally a Horsehead without huge spikes! new [Re: kfir Simon]
      #5627905 - 01/17/13 11:39 AM

Incredible clarity and vibrant colors = spectacular image. Well done. Gotta love that scope!

Steve


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kfir Simon
Vendor-PowerNewt


Reged: 09/21/10

Re: Finally a Horsehead without huge spikes! [Re: steve leshin]
      #5631075 - 01/19/13 05:36 AM

Thank you all!

Chris - I have noticed that the spider isn't perfectly stiff - causing some collimation shift as the tube rotates from one side of the sky to the other.
I think it is due the weight of the large secondary mirror.
I found a simple solution - at every new object - I collimate the secondary again.
Since I rarely image an object for longer then +/- 2Hrs -the scope remains in collimation for this 30 deg movement in the sky.

I think that wider vanes will elliminate this effect (the ones I use are 1" wide and there are 1.5" wide in the market)

I hope this helps....

All the best,

Kfir


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Bill Snyder
Pooh-Bah


Reged: 05/17/09

Loc: Pennsylvania. USA
Re: Finally a Horsehead without huge spikes! new [Re: kfir Simon]
      #5631758 - 01/19/13 03:28 PM

That's quite a nice 82 min image!!
Bill


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alpal
Post Laureate


Reged: 06/15/09

Loc: Melbourne Australia.
Re: Finally a Horsehead without huge spikes! new [Re: kfir Simon]
      #5631819 - 01/19/13 04:09 PM

Quote:

Thank you all!

Chris - I have noticed that the spider isn't perfectly stiff - causing some collimation shift as the tube rotates from one side of the sky to the other.
I think it is due the weight of the large secondary mirror.
I found a simple solution - at every new object - I collimate the secondary again.
Since I rarely image an object for longer then +/- 2Hrs -the scope remains in collimation for this 30 deg movement in the sky.

I think that wider vanes will elliminate this effect (the ones I use are 1" wide and there are 1.5" wide in the market)

I hope this helps....

All the best,

Kfir





Hi Kfir,
Well it's a major improvement on this pic without the curved spider using the power Newt.:

http://www.pbase.com/powernewts/image/129656834/original

I hope you can get a stronger spider to stop that re-collimation problem.


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Raginar
Postmaster
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: Finally a Horsehead without huge spikes! new [Re: alpal]
      #5632565 - 01/20/13 02:10 AM

Thanks for the kfir! Exactly what I wanted to know.

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broca
Carpal Tunnel
*****

Reged: 03/26/10

Loc: Ocala, FL
Re: Finally a Horsehead without huge spikes! new [Re: Raginar]
      #5632689 - 01/20/13 07:13 AM

The curved spider design looks to be quite the performer. Your stars look great, well shaped and sharp. Congrats on a fine image!

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