Much better seeing

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Bruce Girrell
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Much better seeing

Post by Bruce Girrell » Thu Mar 29, 2018 3:30 pm

The high cloud layer was gone, the atmosphere was steadier, and there was a bright new prom (on the WNW side in this image) when I took a quick look after work yesterday.
Had to take a picture


Lunt LS80THa
ZWO ASI174MM
17_19_42_lapl4_ap1795 colored.jpg
17_19_42_lapl4_ap1795 colored.jpg (634.06 KiB) Viewed 659 times
Last edited by Bruce Girrell on Thu Mar 29, 2018 11:04 pm, edited 1 time in total.

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Montana
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Re: Much better seeing

Post by Montana » Thu Mar 29, 2018 4:43 pm

Wow! the proms are magnificent :hamster: :bow much more exciting than the disc :)
Alexandra

Bruce Girrell
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Re: Much better seeing

Post by Bruce Girrell » Thu Mar 29, 2018 5:25 pm

The prom was quite bright when I first looked at it. It was fading as I made my full disk exposure. A mere 8 minutes later, only enough time to screw the 5x Powermate in place, refocus and readjust, and the prom had faded considerably.

I think they show up best if you click on the BW image

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17_26_57_lapl6_ap1561 colored.jpg
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Montana
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Re: Much better seeing

Post by Montana » Fri Mar 30, 2018 2:59 pm

Yes the B&W is :bow
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Bruce Girrell
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Re: Much better seeing

Post by Bruce Girrell » Fri Mar 30, 2018 6:14 pm

Thanks Alexandra

I tried reworking it today with some suggestions from Mark Townley's processing video. Two things in particular were helpful:
1) Flattening the brightness range of the image using a heavily median filtered copy of the image and
2) Keeping an eye on the histogram as you're making adjustments
Thanks Mark

I like the detail in the disk better, but I lost some in the proms. Flattening the image takes a little practice to see what works best. The simple Darken curve didn't work for me and I used the Curves dialog as normal, which produced a good result. You have to play a bit. I have always relied heavily on the histogram, but I hadn't realized that Photoshop's dedicated histogram window shows both the original and the result of your adjustment as you're doing it. Very helpful.
17_26_57_lapl6_ap1561MTa1.jpg
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eroel
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Re: Much better seeing

Post by eroel » Fri Mar 30, 2018 6:40 pm

Bruce:
Very good, you got very clean and sharp images.
Best regards,
Eric.


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Re: Much better seeing

Post by marktownley » Mon Apr 02, 2018 4:33 pm

Nice images Bruce
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

Bruce Girrell
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Re: Much better seeing

Post by Bruce Girrell » Mon Apr 02, 2018 5:23 pm

Thanks all
And thanks for making your video tutorials, Mark. I should have mentioned your use of the iterative unsharp mask also. It is clear that a 10% USM, applied 10 times is superior to a 100% USM of the same size. Sometimes after applying the action, I find that the 10x is a little too much, but the History allows me to step back into the succession of USM applications and choose the sharpness that I like. Another advantage.
Last edited by Bruce Girrell on Tue Apr 03, 2018 1:16 am, edited 2 times in total.

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Re: Much better seeing

Post by marktownley » Mon Apr 02, 2018 6:38 pm

Glad you find the tutorials useful Bruce
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http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Ronnie_Clayton
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Re: Much better seeing

Post by Ronnie_Clayton » Sun Apr 08, 2018 12:44 am

Wow, incredible images and fine details, especially in proms :bow

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Re: Much better seeing

Post by MapleRidge » Sun Apr 08, 2018 1:25 am

Excellent capture and processing Bruce...well done :bow

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Carbon60
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Re: Much better seeing

Post by Carbon60 » Sun Apr 08, 2018 9:04 am

Nicely done, Bruce. Lovely prom images.

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Re: Much better seeing

Post by Derek Klepp » Sun Apr 08, 2018 9:47 am

That last image came up well thanks for the pics Bruce.

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