9 inch Rumak: granulation and AR2738
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9 inch Rumak: granulation and AR2738
Today I tried out the 9 inch Rumak. Optics are made by Intes: MK-91. So it is a 9 inch f/13,5 Rumak. Rebuild (not by me) in a 33cm diameter double Carbon tube. The inside of the Tube is isolated. Heavy machine: about 14kg.
But for the Cem 60 it is no real problem:
20190422_105326_resized by bart moors, on Flickr
Nice backfcocus!
20190422_105251_resized by bart moors, on Flickr
Wanted to image the granulation. Seeing was bad, so besides the Naader AstroSolar ND3.8 I had to use an Astromik Red filter. Difficult to focus without any sunspots and these conditions, but here is the result:
Sun_102036_220419_Gain=0(off)_Exposure=2ruis_PS by bart moors, on Flickr
And a goodbye to AR2738, image taken last friday with the 150mm Skywactcher achromat:
Moon_104250_190419_Gain=0(off)_Exposure=4_2 by bart moors, on Flickr
Thanks for watching! Bart.
But for the Cem 60 it is no real problem:
20190422_105326_resized by bart moors, on Flickr
Nice backfcocus!
20190422_105251_resized by bart moors, on Flickr
Wanted to image the granulation. Seeing was bad, so besides the Naader AstroSolar ND3.8 I had to use an Astromik Red filter. Difficult to focus without any sunspots and these conditions, but here is the result:
Sun_102036_220419_Gain=0(off)_Exposure=2ruis_PS by bart moors, on Flickr
And a goodbye to AR2738, image taken last friday with the 150mm Skywactcher achromat:
Moon_104250_190419_Gain=0(off)_Exposure=4_2 by bart moors, on Flickr
Thanks for watching! Bart.
- marktownley
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Re: 9 inch Rumak: granulation and AR2738
Looks like you're having fun Bart! Nice images. What fl and camera with the WL shot?
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Re: 9 inch Rumak: granulation and AR2738
Indeed Mark! Forgot to mention it: prime focus so about 3100mm. ASI290MM.marktownley wrote: ↑Mon Apr 22, 2019 2:03 pm Looks like you're having fun Bart! Nice images. What fl and camera with the WL shot?
Besides the Red filter I also used a 2 inch Beloptik UV/IR cut on kg3.
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Re: 9 inch Rumak: granulation and AR2738
Nice configuration Bart!
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Re: 9 inch Rumak: granulation and AR2738
A very nice scope and a killer granulation shot, Bart ! What etalon did you use for the Ha ?
Franco
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Re: 9 inch Rumak: granulation and AR2738
Hi Franco, thanks!
Baader D-erf - Baader 35nm H-alpha - Baader 1,25x glasspath - PST etalon - Lunt B1200 - ASI290MM.
So a normal PST etalon.
At the moment Gerd Neuman (Astronomik) is rebuilding a filter drawer so I can doublestack my two PST etalons. In the filter drawer there goes a circular polarizer.
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Re: 9 inch Rumak: granulation and AR2738
Excellent first light !
A 10"ERF might be of use for this scope.
A 10"ERF might be of use for this scope.
Christian Viladrich
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Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
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Re: 9 inch Rumak: granulation and AR2738
Thanks Christian. Yes, it would definitely be of use! But to fund it I would have to sell the Rumak. (-;christian viladrich wrote: ↑Mon Apr 22, 2019 5:22 pm Excellent first light !
A 10"ERF might be of use for this scope.
- MAURITS
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Re: 9 inch Rumak: granulation and AR2738
Great images. That's a interesting scope and a good performer.
Phil
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Re: 9 inch Rumak: granulation and AR2738
Hi Bart...
Awesome WL and Ha images with the scope...the granulation is extraordinary
Brian
Awesome WL and Ha images with the scope...the granulation is extraordinary
Brian
Brian Colville
Maple Ridge Observatory
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Photos: https://www.flickr.com/photos/185395281@N08/albums
10'x15 Roll-off Roof Observatory
Takahashi EM400 Mount carrying:
C14 + Lunt 80ED
Deep Sky Work - ASI294MM Pro+EFW 7x36/Canon 60D (Ha mod), ONAG
Planetary Work - SBIG CFW10, ASI462MM
2.2m Diameter Dome
iOptron CEM70G Mount carrying:
Orion EON 130ED, f7 OTA for Day & Night Use
Ha Setup: Lunt LS80PT/LS75FHa/B1200Ha + Home Brew Lunt Double Stack/B1800Ha on the Orion OTA + Daystar Quantum
WL, G-Band & CaK Setup: Lunt Wedge & Lunt B1800CaK, Baader K-Line and Altair 2nm G-Band filter
ASI1600MM, ASI432MM, ASI294MM Pro, ASI174MM, ASI462MM
Maple Ridge Observatory
Cambray, ON Canada
Photos: https://www.flickr.com/photos/185395281@N08/albums
10'x15 Roll-off Roof Observatory
Takahashi EM400 Mount carrying:
C14 + Lunt 80ED
Deep Sky Work - ASI294MM Pro+EFW 7x36/Canon 60D (Ha mod), ONAG
Planetary Work - SBIG CFW10, ASI462MM
2.2m Diameter Dome
iOptron CEM70G Mount carrying:
Orion EON 130ED, f7 OTA for Day & Night Use
Ha Setup: Lunt LS80PT/LS75FHa/B1200Ha + Home Brew Lunt Double Stack/B1800Ha on the Orion OTA + Daystar Quantum
WL, G-Band & CaK Setup: Lunt Wedge & Lunt B1800CaK, Baader K-Line and Altair 2nm G-Band filter
ASI1600MM, ASI432MM, ASI294MM Pro, ASI174MM, ASI462MM
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Re: 9 inch Rumak: granulation and AR2738
Wow! the granulation is amazing! I think your bad seeing is the same as my good seeing
Alexandra
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Re: 9 inch Rumak: granulation and AR2738
Thanks all!
Alexandra, since using the SSM my idea of good and bad seeing is shifting a bit. When I look at the SSM, it jumps up and down. So when the average seeing is bad, there are still a few moments when the seeing is actually pretty good. This was captured during such a moment.
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Re: 9 inch Rumak: granulation and AR2738
Good logic Bart!
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
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Re: 9 inch Rumak: granulation and AR2738
Bravo on the granulation shot Bart. Looks like your going to have some fun with that particular scope!
Christopher
"Our imagination is stretched to the utmost, not, as in fiction, to imagine things which are not really there, but just to comprehend those things which 'are' there.". -Feynman
"Our imagination is stretched to the utmost, not, as in fiction, to imagine things which are not really there, but just to comprehend those things which 'are' there.". -Feynman
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Re: 9 inch Rumak: granulation and AR2738
Great HR images Bart. The Rumak is a great instrument
Last edited by pedro on Thu Apr 25, 2019 11:54 am, edited 2 times in total.
Pedro Re'
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https://pedroreastrophotography.com/
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Re: 9 inch Rumak: granulation and AR2738
Thanks Christopher and Pedro. Looking forward to using the scope on the moon, planets and the sun. Bought it in june last year, tried it out for a couple of weeks. And then decided to change the focuser because I was not pleased with it. Put the scope upside down so I could work in a more comfortable position. Did not realise the primary was held by just the adapter plate of the focuser. So when removing the focuser the complete primary (plus baffle) dropped down. Thank god it did not hit the corrector.....Christopher wrote: ↑Tue Apr 23, 2019 5:24 pm Bravo on the granulation shot Bart. Looks like your going to have some fun with that particular scope!
In the fall I brought it to a friend I met on a Dutch forum. He also fine-tuned my Intes M703 some time ago. It took him a while, but the scope is now even better than before. He changed amongst other things the secondary holder. And collimated it perfectly. Really happy to have it back again!