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Today's SUN (20190110) | LUNT60 SS & DS

Posted: Thu Jan 10, 2019 5:28 pm
by pedro
Today's SUN (20190110) | SS & DS LUNT60

A very slow sun today

WEBLINK:
http://re.apaaweb.com/sun_h_alpha_2019-01.html

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IMAGING SETUPS

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IMAGING SETUPS

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IMAGING SETUPS

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IMAGING SETUPS

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SUN (20190110) LUNT60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M (Single Stack versus Double Stack)

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SUN (20190110) H-alpha DISK (11:30 UTC). LUNT60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20190110) H-alpha DISK & PROMS (11:00 UTC). TV101 F/5.4, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20190110) H-alpha DISK & PROMS (11:00 UTC). TV101 F/5.4, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20190110) CaK PROMS (11:00 UTC). TV101 F/5.4, LUNT 1200 CaK Module, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20190110) WL, CaK & H-alpha (11:00 UTC). TV101 F/5.4, LUNT 1200 CaK Module, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Fri Jan 11, 2019 12:47 am
by ffellah
A beautiful and complete set, Pedro.

Franco

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Fri Jan 11, 2019 1:03 am
by pedro
Thanks a lot Franco

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Fri Jan 11, 2019 8:47 am
by Montana
Terrific shots Pedro, not much going on but still bright and sunny :)
:bow
Alexandra

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Fri Jan 11, 2019 10:05 am
by MAURITS
Nice captures Pedro ...

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Fri Jan 11, 2019 11:53 am
by pedro
Thanks guys

I have a love-hate relationship with DS etalons. The one I tested in not that good, I spent a long time adjusting everything and I cannot see a big difference

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Fri Jan 11, 2019 5:00 pm
by robert
pedro wrote:
Fri Jan 11, 2019 11:53 am
I have a love-hate relationship with DS etalons. The one I tested in not that good, I spent a long time adjusting everything and I cannot see a big difference
I used to think that but Mark alerted me to the possibility of prominences and surface in the same shot. Same exposure for both (one shot only), increased gamma and at the expense of a slower speed, but a nice result I think.
Robert

PS great shots as always too

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Sat Jan 12, 2019 6:42 am
by marktownley
Good collection indeed!

I'm guessing you run with low gamma on the camera when you are doing your disk shots Pedro? That's why the SS/DS side by side shot the DS looks much darker but with little difference in contrast to the SS shot. My DS shots I run with neutral gamma, sometimes run higher gamma if the proms are feint. There is no right or wrong way and different ways produce different results.

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Sat Jan 12, 2019 10:56 am
by pedro
Thanks Mark

I also tried neutral gamma but I could not adjust the two etalons properly. It's not easy. This DS LUNT etalon (LS50F) belongs to a friend

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Sat Jan 12, 2019 5:52 pm
by marktownley
I always adjust inner etalon first and then get the double stack etalon tuned so there is no banding due to excess tilt. The primary etalon then gets fine tuned accordingly.

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Sat Jan 12, 2019 7:06 pm
by pedro
Thanks Mark

I will give it a go but my feeling is that I get better results with Single-Stack

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Sun Jan 13, 2019 11:09 am
by marktownley
pedro wrote:
Sat Jan 12, 2019 7:06 pm
Thanks Mark

I will give it a go but my feeling is that I get better results with Single-Stack
I think you do too. That 60 of yours is a nice scope.

Re: Today's SUN (20190110) | LUNT60 SS & DS

Posted: Sun Jan 13, 2019 12:35 pm
by pedro
Thanks again Mark