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

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

Post by pedro » Thu Jan 10, 2019 5:28 pm

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
Last edited by pedro on Fri Jan 11, 2019 11:56 am, edited 1 time in total.

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

Post by ffellah » Fri Jan 11, 2019 12:47 am

A beautiful and complete set, Pedro.

Franco


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

Post by Montana » Fri Jan 11, 2019 8:47 am

Terrific shots Pedro, not much going on but still bright and sunny :)
:bow
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Re: Today's SUN (20190110) | LUNT60 SS & DS

Post by MAURITS » Fri Jan 11, 2019 10:05 am

Nice captures Pedro ...
Regards,
Maurits

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

Post by pedro » Fri Jan 11, 2019 11:53 am

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

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

Post by robert » Fri Jan 11, 2019 5:00 pm

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
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2019 images https://tinyurl.com/yd5vht7r
2018 images https://www.flickr.com/photos/69734017@ ... 1234171714
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Re: Today's SUN (20190110) | LUNT60 SS & DS

Post by marktownley » Sat Jan 12, 2019 6:42 am

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

Post by pedro » Sat Jan 12, 2019 10:56 am

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

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

Post by marktownley » Sat Jan 12, 2019 5:52 pm

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

Post by marktownley » Sun Jan 13, 2019 11:09 am

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.
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