17092017-AR2680 and western limb

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bart1805
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17092017-AR2680 and western limb

Post by bart1805 » Sun Sep 17, 2017 2:39 pm

This time I did take a flat so did not have to work very hard to remove the gradients. Unfortunately no time to compare the double stack with the singe stack.
Bresser 127 with two PST etalons etc.

AR2680

Image170917_10h14m_Br127_DS_PM2,5x_AR2680_PS by bart moors, on Flickr

AR2680 inverted and coloured

Image170917_10h14m_Br127_DS_PM2,5x_AR2680_PS_Inverted by bart moors, on Flickr

And a coloured version of the western limb

Image170917_10h23m_Br127_DS_PM2,5x_westernlimb_PSinverted by bart moors, on Flickr

Thanks for watching! Bart.
Last edited by bart1805 on Sun Sep 17, 2017 3:55 pm, edited 1 time in total.

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Re: 17092017-AR2680 and western limb

Post by rsfoto » Sun Sep 17, 2017 3:37 pm

Great images
regards Rainer

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bart1805
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Re: 17092017-AR2680 and western limb

Post by bart1805 » Sun Sep 17, 2017 4:17 pm

Thanks Rainer!

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Re: 17092017-AR2680 and western limb

Post by Montana » Sun Sep 17, 2017 5:19 pm

Fantastic images, I really enjoyed these :bow :hamster:
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Re: 17092017-AR2680 and western limb

Post by marktownley » Wed Sep 20, 2017 5:51 am

You're getting nice results with that Bresser!
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http://brierleyhillsolar.blogspot.co.uk/
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Re: 17092017-AR2680 and western limb

Post by Merlin66 » Mon Jan 14, 2019 9:02 pm

Bart,
Just re-visiting the PST DS thread.....
Any updates on your set-up???
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
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"Imaging Sunlight - using a digital spectroheliograph" - Springer

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Re: 17092017-AR2680 and western limb

Post by bart1805 » Mon Jan 14, 2019 9:13 pm

Hi Merlin,
A few, but not so much doublestack H-alpha related....
Just bought a CEM60 with a tripod pier. Much easier to transport into the garden than the HEQ5 on the pillar mount.
The doublestack CaK filter is ready, telescope is ready to begin testing. Although the sun is quite low now, this weekend looks promising.
Still struggling with the 150mm f8 Skywatcher. Changed the focuser, that seems to be an improvement. Doublestack seemed to work better with the 127mm Bresser, so I am looking forward to more testing this spring.
CS! Bart.

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Re: 17092017-AR2680 and western limb

Post by ffellah » Tue Jan 15, 2019 2:20 am

Excellent results, Bart ! Great detail and processing

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Re: 17092017-AR2680 and western limb

Post by eroel » Tue Jan 15, 2019 5:05 am

Bart:
Really nice clean and crisp shots.
Best regards,
Eric.

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Re: 17092017-AR2680 and western limb

Post by MAURITS » Tue Jan 15, 2019 5:17 pm

Very very nice Bart, congrats ...
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Re: 17092017-AR2680 and western limb

Post by Carbon60 » Tue Jan 15, 2019 6:25 pm

Lovely historical shots, Bart.

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Re: 17092017-AR2680 and western limb

Post by bart1805 » Tue Jan 15, 2019 9:27 pm

Thanks guys and thanks Ken for reviving this thread. Which, by the way, is also a bit painful. This session was one of the few successful sessions with two stacked PST etalons. I switched to the Skywatcher 150mm and gained 2,3 cm but never had the succes as with the Bresser. Will try it again this spring and then decide to maybe go back to the Bresser. CS! Bart.

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Re: 17092017-AR2680 and western limb

Post by Merlin66 » Tue Jan 15, 2019 10:43 pm

Bart,
I said back in 2009, that the PST DS was a pain in the butt to tune, so much so I gave up.....
Following your success and finding more rusty pins to stick in my eye (!!) I'm going to revisit this option.
Certainly an interesting option.....
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

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