Outreach with firecapture/pst?

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39N84W
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Outreach with firecapture/pst?

Post by 39N84W » Mon Jun 04, 2018 1:07 pm

I'm using an asi178 along with a pst and firecapture. I really like the software... but I'm having a tough time getting the proms to "pop". Any advice with firecapture settings would be greatly appreciated. :)

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marktownley
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Re: Outreach with firecapture/pst?

Post by marktownley » Mon Jun 04, 2018 2:44 pm

Just turn up the exposure?
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39N84W
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Re: Outreach with firecapture/pst?

Post by 39N84W » Mon Jun 04, 2018 2:56 pm

If I increase exposure time or gain the histogram quickly gets to 100% and it's blown out. I read that I should keep the histogram around 60-80%.

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Re: Outreach with firecapture/pst?

Post by PDB » Mon Jun 04, 2018 3:04 pm

No way you can get surface and proms in one exposure. For proms you need to turn up exposure, surface detail will be higly overexposed and your histograram way over 100%, but that is the only way to do it. Brightness level between proms and surface is too big.

You have to combine separate exposure in post processing to get both on the same picture.

Update: with the ASI178 in 16 bit mode in FireCapture it is actually possible to capture both surface and proms, but the proms will be very faint. In the stacked image (from AS!3) you can make them visible by playing with the gamma settings. (But then surface will get overexposed again)

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pedro
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Re: Outreach with firecapture/pst?

Post by pedro » Mon Jun 11, 2018 3:28 pm

I always take 3 separate sets of videos with different gamma settings.

Low gamma values for surface detail and high for proms.

You can also overexpose the disk to get more prom detail

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Re: Outreach with firecapture/pst?

Post by banjo » Tue Jun 12, 2018 12:39 pm

a Mr Colmic solution with photoshop to bring out the low levels
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marktownley
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Re: Outreach with firecapture/pst?

Post by marktownley » Tue Jun 12, 2018 9:46 pm

Thanks for sharing your settings :)
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