1st March disk

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robert
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1st March disk

Post by robert » Thu Mar 01, 2018 12:37 pm

Another clear day with a bitter wind. UK covered in cloud except for NW, extremely unusual, the opposite way round is the norm.
Robert

Image0301 01_Mar_18_112043_g4_ap541 by robertarnold, on Flickr
0301 sat24.jpg
0301 sat24.jpg (180.83 KiB) Viewed 731 times
Last edited by robert on Thu Mar 01, 2018 12:55 pm, edited 1 time in total.
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Re: 1st March disk

Post by Ewan » Thu Mar 01, 2018 12:54 pm

Very nice FD Robert, my solar season has been sporadic but always looking forwards.

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robert
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Re: 1st March disk

Post by robert » Thu Mar 01, 2018 12:57 pm

Thanks Ewan, yes I agree. Take any chances if possible!
images and animations http://tinyurl.com/h5bgoso
2018 images https://www.flickr.com/photos/69734017@ ... 1234171714
2017 images http://tinyurl.com/gvk9k3k
ED80. SW200. ES127. Celestron-150mm-PST mod
LS60PT-LS60F-B1200. B600-Cak. PGR-Ch3-IMX265

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Re: 1st March disk

Post by Ibbo » Thu Mar 01, 2018 1:28 pm

Nicely done.

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Christopher
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Re: 1st March disk

Post by Christopher » Thu Mar 01, 2018 2:18 pm

The weekend weather here looks promising and so does that disk. Nice shot Robert.
Christopher

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Re: 1st March disk

Post by eroel » Thu Mar 01, 2018 3:34 pm

Robert:
Nice and clean FD.
Best wishes,
Eric.

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Re: 1st March disk

Post by ffellah » Thu Mar 01, 2018 6:06 pm

Another fine disk, Robert !

Franco

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Re: 1st March disk

Post by rsfoto » Thu Mar 01, 2018 8:15 pm

Nice nice nice and I have no chance to image at the moment

:cry:
regards Rainer

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Re: 1st March disk

Post by MapleRidge » Fri Mar 02, 2018 12:45 am

Superb shot Robert :bow

Nice to see some return to activity in your image.

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Re: 1st March disk

Post by Montana » Fri Mar 02, 2018 10:38 am

That's a lovely AR developing :hamster: :bow very unusual to see a gap in the cloud up there :lol:
Alexandra

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Re: 1st March disk

Post by marktownley » Fri Mar 02, 2018 12:30 pm

You were lucky with the weather there Robert! A great disk as a result.
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Re: 1st March disk

Post by rbenton » Sat Mar 03, 2018 12:41 am

I love the quality of your FD images. So evenly exposed, with just enough limb darkening to look spherical. It also looks like you are not combining two images (surface/proms) but I still see detail in both. Could you share how you get this look?
Still learning.

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robert
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Re: 1st March disk

Post by robert » Sat Mar 03, 2018 11:43 am

rbenton wrote:
Sat Mar 03, 2018 12:41 am
I love the quality of your FD images. So evenly exposed, with just enough limb darkening to look spherical. It also looks like you are not combining two images (surface/proms) but I still see detail in both. Could you share how you get this look?
Still learning.

Randall Benton
www.randallbenton.com
Thanks Randall,
I guess I like a simple process.

1. Double stacked Pressure tuned scope. Pressure tuner gives an even start. I was lucky with the second etalon being onband with nearly no tilt so the image stays even when it is added. PGR Ch3 3.2Mpx gives a full disk with no mosaic with LS60, UV/IR cut filter and tilt adapter to remove Newton's rings.
First tune the scope PT very carefully with an overexposed image to get the filter effect central, then add the non adjusted second etalon with no tilt.

2. Firecapture using gamma to around 1000 to just see the prominences and not overexpose things, histogram 70% ish. 500 frames 37fps.

3. AS2 stack about 10%-20% then PS2 (Photoshop), iterative unsharp mask 30%, 1px, 0 threshold, until it becomes overdone then undo one or two iterations. Convert to RGB, add colour and boost brightness and contrast for the disk and cut red in levels to make the background less hazy red. Check, done.

Whole image processed the same way and only one exposure, which is what I prefer to do just now.

Robert
P5075583s.jpg
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images and animations http://tinyurl.com/h5bgoso
2018 images https://www.flickr.com/photos/69734017@ ... 1234171714
2017 images http://tinyurl.com/gvk9k3k
ED80. SW200. ES127. Celestron-150mm-PST mod
LS60PT-LS60F-B1200. B600-Cak. PGR-Ch3-IMX265

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Re: 1st March disk

Post by rbenton » Sat Mar 03, 2018 11:55 pm

Thank you very much Robert. I'll give it a try.

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Re: 1st March disk

Post by marios i. » Mon Mar 05, 2018 11:57 am

Very nice!

Marios

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