Calcium Sun June 15, 2022
- ffellah
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Calcium Sun June 15, 2022
Hello all: a very quick 15 minute session this morning before going to work to capture the (9 !) active regions, now that activity is ramping up again. Evostar 72mm ED scope stopped to 35mm, Daystar CaH filter, PG 814 camera.
Franco
Franco
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Re: Calcium Sun June 15, 2022
Great CaH images Franco!
Last edited by nicosolcy on Thu Jun 16, 2022 9:43 am, edited 1 time in total.
Nick
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Re: Calcium Sun June 15, 2022
These are excellent Franco!
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Re: Calcium Sun June 15, 2022
That's a gorgeous CaH disc Franco! You have proven that CaH is a very viable alternative to CaK.
Two thumbs up!!
James
Two thumbs up!!
James
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Re: Calcium Sun June 15, 2022
A very clean and beautiful image Franco, there is a lot of plage about. I wonder if this set of three in the north we have seen before. I need to look back on spaceweather 3-4 weeks.
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Re: Calcium Sun June 15, 2022
Thank you Nick, Jochen, Mark, James and Alexandra for your comments.
Franco
Franco
Last edited by ffellah on Thu Jun 16, 2022 12:29 pm, edited 1 time in total.
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Re: Calcium Sun June 15, 2022
Excellent Franco, I always like your CaH images.
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Re: Calcium Sun June 15, 2022
Hi Franco, what's your impression of CaH vs CaK?
Is your photo rotated slightly counter-clockwise on purpose?
Is your photo rotated slightly counter-clockwise on purpose?
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Re: Calcium Sun June 15, 2022
Great FD Ca-K images Franco, well done, lots of activity
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Re: Calcium Sun June 15, 2022
Very good Franco, nice contrast
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Re: Calcium Sun June 15, 2022
Well deserved they are, Franco.
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Re: Calcium Sun June 15, 2022
Very nice the sun face in Ca-H !
Question: have you ever observed the sun _visually_ with DayStar CaH Quark?
If yes, how easy or difficult all these active areas can be seen?
Valery
Question: have you ever observed the sun _visually_ with DayStar CaH Quark?
If yes, how easy or difficult all these active areas can be seen?
Valery
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Re: Calcium Sun June 15, 2022
Fantastic capture Franco!
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Re: Calcium Sun June 15, 2022
That is a good question. It’s still probably quite low in contrast visually. I would like to try it.
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Re: Calcium Sun June 15, 2022
Really nice CaH FDs, Franco. Nice work.
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Re: Calcium Sun June 15, 2022
Hello all: thank you all for the very kind words and sorry for the late response. @thesmiths: I should have used the SDO image to correctly orient my image but it was a very quick session in the morning before work and the SDO image was taken actually in the evening before posting. Maybe next time. CaH vs CaK: I never tried CaK but I greatly admire all images from members of this forum. In his book Christian says there is no practical difference in results between CaH and CaK images. So far, I am satisfied with the quality of full disk images coming out of the Quark, as it is a relatively inexpensive Calcium filter. On high magnification/resolution I have not achieved yet my best results, probably because of seeing and processing technique, but will continue to try hard, weather permitting. I find the Quark CaH very easy to use and I think it represents great value. BTW, congratulations on the SPOD ! @Valery: initially, back in November when I received the filter I observed with it. The first time I was able to see the sunspots but the view was definitely very dark and I had to look for the features. Second time I could not see anything, maybe because of smaller features. So observing is possible but challenging. I had cataract surgery few years ago and my eyesight is good now, so that helps. I will try observing again in the future and will post results.
Franco
Franco
Last edited by ffellah on Sat Jun 18, 2022 2:16 pm, edited 1 time in total.
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Re: Calcium Sun June 15, 2022
When I look at the K and H lines through a spectrometer, I can see that the slightly longer wavelength (H) is considerably brighter, at least on a camera sensor. That may not make enough difference visually though. It can lead to better shutter-speed/gain settings so for the same bandwidth, H ought to give slightly better imaging results, all else being equal.
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Re: Calcium Sun June 15, 2022
I would be thrilled with either a Lunt CaK module or a DayStar CaH Quark.
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Re: Calcium Sun June 15, 2022
Franco:
Beautiful CaK FD´s.
Best regards and thanks for sharing.
Eric.
Beautiful CaK FD´s.
Best regards and thanks for sharing.
Eric.
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Re: Calcium Sun June 15, 2022
Lovely. CaK images always make me think of a Tarkovsky science fiction movie with a completely oceanic planet and just a few archipelagos of islands dotted in the vastness.
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Re: Calcium Sun June 15, 2022
Thank you very much Eric and Vin. Love you comment about the science fiction movie !
Franco
Franco