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AR2740 in CaK, 05052019

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bart1805
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AR2740 in CaK, 05052019

Post by bart1805 » Sun May 05, 2019 10:50 am

This morning it was hit and run between the clouds. But I desperately wanted to try if doubling the distance between the lenses of the 100mm f/9 ED worked or not. Seeing was not bad, no time to use the SSM. Just a few moves of 30 seconds each.
Yesterday I also received the first two tilt adapters, these were discussed here:
viewtopic.php?f=9&t=25552

Here a picture of one of them and the image train for CaK:

Image20190504_210733_resized by bart moors, on Flickr

Image20190504_211725_resized by bart moors, on Flickr

No time to really try them, but yes the image changes when you change the tilt. And it seems possible to get rid of the reflections. For this image they were in the neutral position.
Used the Lunt nosepiece plus just the two PST#1 filters. No K-line, low gain, no gamma. ASI290MM, IMPPG and shadows and highlights in PS.

ImageMoon_105045_050519_Gain=18(off)_Exposure=8 by bart moors, on Flickr

Is it better than with the original distance of the lenses? I think so, but can't really compare. It seemed a bit easier to focus. For now I am satisfied, one down on the everlasting list of things to do....!
Thanks for watching, Bart.

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Re: AR2740 in CaK, 05052019

Post by marktownley » Sun May 05, 2019 11:48 am

Nice shot Bart! the spicules are coming out well. Where did you get the tilt adapters from in the end?
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Re: AR2740 in CaK, 05052019

Post by ffellah » Sun May 05, 2019 12:26 pm

A very nice image, Bart !

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Re: AR2740 in CaK, 05052019

Post by krakatoa1883 » Sun May 05, 2019 1:16 pm

Very sharp image, Bart, spicules, prominence and penumbra filaments came out well. It seems really promising. Just to complete the picture try to see what happens to the other colors, green and red, if they now show spherical aberration and how much.
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Re: AR2740 in CaK, 05052019

Post by MalVeauX » Sun May 05, 2019 2:29 pm

Really nice Bart! Just seeing the prominences and spicules on that limb is very promising!

Very best,

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Re: AR2740 in CaK, 05052019

Post by bart1805 » Sun May 05, 2019 2:46 pm

marktownley wrote:
Sun May 05, 2019 11:48 am
Nice shot Bart! the spicules are coming out well. Where did you get the tilt adapters from in the end?
These two are made by Beloptik. The two other adapters by Gerd Neuman (Astronomik Filters).

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Re: AR2740 in CaK, 05052019

Post by bart1805 » Sun May 05, 2019 2:47 pm

krakatoa1883 wrote:
Sun May 05, 2019 1:16 pm
Very sharp image, Bart, spicules, prominence and penumbra filaments came out well. It seems really promising. Just to complete the picture try to see what happens to the other colors, green and red, if they now show spherical aberration and how much.
Yes, it looks promising! Good idea to test the other colours for SA, will put the test on the list.

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Re: AR2740 in CaK, 05052019

Post by Montana » Sun May 05, 2019 5:35 pm

Exceptional CaK :bow :hamster:

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Re: AR2740 in CaK, 05052019

Post by MAURITS » Sun May 05, 2019 6:32 pm

Very nice and sharp Bart.
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Re: AR2740 in CaK, 05052019

Post by Carbon60 » Mon May 06, 2019 5:56 am

Very, very nice indeed, Bart. Nice work with your bespoke setup.

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Re: AR2740 in CaK, 05052019

Post by bart1805 » Mon May 06, 2019 10:10 pm

Thanks!
Looking forward to try what the results are of tilting the filters.

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Re: AR2740 in CaK, 05052019

Post by banjo » Tue May 07, 2019 6:06 am

Very Nice Bart,bravo!!
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