AR12738 - CaH

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krakatoa1883
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AR12738 - CaH

Post by krakatoa1883 » Sat Apr 13, 2019 8:28 pm

This spot is becoming popular :lol: notwithstanding the recent predictions for a deep and long solar minimum I very much hope to see other spots like this one. Today I succeeded to take one image with my 100ED, again between clouds with some apertures lasting enough to allow some work. Thanks for looking.
2019-04-13-1359-RB-CaH-AR12738b.jpg
2019-04-13-1359-RB-CaH-AR12738b.jpg (105.28 KiB) Viewed 153 times
Last edited by krakatoa1883 on Sun Apr 14, 2019 11:09 am, edited 1 time in total.
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Re: AR12738 - CaH

Post by MapleRidge » Sat Apr 13, 2019 8:48 pm

Superb shot Raf :bow

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Re: AR12738 - CaH

Post by marktownley » Sat Apr 13, 2019 9:17 pm

That's an excellent closeup Raf!
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Re: AR12738 - CaH

Post by ffellah » Sun Apr 14, 2019 12:38 am

Beautiful image, Raf !

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Re: AR12738 - CaH

Post by krakatoa1883 » Sun Apr 14, 2019 1:22 pm

Thanks to all!
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Re: AR12738 - CaH

Post by marktownley » Sun Apr 14, 2019 3:21 pm

It's nice to see you getting sme good results with this scope, I know bob yoesle gets good images too in the blue end. It's one that's on my potential radar.
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Re: AR12738 - CaH

Post by Carbon60 » Sun Apr 14, 2019 3:59 pm

Very nice close view in CaH, Raf.

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Re: AR12738 - CaH

Post by christian viladrich » Mon Apr 15, 2019 7:03 pm

Hello Raf,
The image is quite good. It seems to me that there is a shift in the center wave length ? Or maybe an artefact due to the passing clouds ?
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Re: AR12738 - CaH

Post by krakatoa1883 » Mon Apr 15, 2019 7:20 pm

Thanks, Christian. Yes, I am experimenting with different tunings as this is a useful feature of the Quark, for this image I set the knob at 0 while the best position would be at -5.
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Re: AR12738 - CaH

Post by bart1805 » Mon Apr 15, 2019 7:26 pm

Nice one Raf! What exposure time are you using with this set up?

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Re: AR12738 - CaH

Post by MAURITS » Mon Apr 15, 2019 8:06 pm

Top rate, very nice captures Raf.
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Re: AR12738 - CaH

Post by eroel » Tue Apr 16, 2019 4:33 am

Raf:
Beautiful clean CaK image.
Best wishes,
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Re: AR12738 - CaH

Post by krakatoa1883 » Tue Apr 16, 2019 5:49 pm

Thanks to all of you.
bart1805 wrote:
Mon Apr 15, 2019 7:26 pm
Nice one Raf! What exposure time are you using with this set up?
I imaged at 30 fps (33ms per frame), 150 frames stacked.
marktownley wrote:
Sun Apr 14, 2019 3:21 pm
It's one that's on my potential radar.
it's a good scope indeed, not only for solar. However I think that for calcium imaging a long focus achromat would be even better. I am trying a Tecnosky 102mm f/11, curious to see if can beat the ED.
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Re: AR12738 - CaH

Post by marktownley » Tue Apr 16, 2019 6:57 pm

Let me know how you get on 👍
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Re: AR12738 - CaH

Post by bart1805 » Tue Apr 16, 2019 7:15 pm

33ms, that is surprisingly long. I did not think it was possible to get sharp images with such a long exposure time. Have to try that myself.

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Re: AR12738 - CaH

Post by krakatoa1883 » Wed Apr 17, 2019 7:16 am

Yes, at max image size it's quite long, usually I try to keep it within 20ms. However the camera works so fine (low noise, no NR, insensitive to dust) that I reluctant to change it. May be next year I will consider to purchase a Basler.
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Re: AR12738 - CaH

Post by Montana » Thu Apr 18, 2019 9:40 am

Wow!!!! :bow :hamster:

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Re: AR12738 - CaH

Post by highfnum » Thu Apr 18, 2019 2:16 pm

very very nice

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