Ho do I know the best brightness to use/try

Somewhere to ask questions about the best way to use SharpCap
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directgumby
Posts: 17
Joined: Tue Sep 10, 2019 4:17 pm

Ho do I know the best brightness to use/try

Post by directgumby » Thu Sep 12, 2019 6:47 pm

Hello,

I had a great progress last night when doing my second capture with SharpCap and made some progress on using the ASI178MC and getting good images with the “auto” settings.
In my work last night, I wasn’t sure when to adjust the brightness and what a good starting location is for the brightness.

Any thoughts on where to start and/or when to adjust the brightness would be greatly appreciated.

Thanks,
Brett
SharpCap 3.2
SkyWatcher AZ GTI Mount (In AZ mode)
SynScan App Pro (Windows: 1.17.3)
ZWO ASI 187 MC
Apatura 60
Windows 10 (1903 build 18362.295)
Laptop SurfaceBook (16 gigs of RAM)

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admin
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Posts: 2966
Joined: Sat Feb 11, 2017 3:52 pm
Location: Vale of the White Horse, UK
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Re: Ho do I know the best brightness to use/try

Post by admin » Sun Sep 15, 2019 12:23 pm

Hi,

The best way to pick your brightness is to set the exposure and the gain to roughly the values that you expect to use, then cover the telescope to allow SharpCap to start showing dark frames, show the histogram and then adjust the brightness if necessary to make sure that the peak of the histogram is clear of the left-hand side of the graph. It doesn't have to be clear by a great distance just by a small amount will be fine.

Cheers, Robin

directgumby
Posts: 17
Joined: Tue Sep 10, 2019 4:17 pm

Re: Ho do I know the best brightness to use/try

Post by directgumby » Mon Sep 16, 2019 11:08 pm

Hello,

Thank you for the suggestion, i'll give it a try the next night I have a clear sky.

Thanks again,
Brett
SharpCap 3.2
SkyWatcher AZ GTI Mount (In AZ mode)
SynScan App Pro (Windows: 1.17.3)
ZWO ASI 187 MC
Apatura 60
Windows 10 (1903 build 18362.295)
Laptop SurfaceBook (16 gigs of RAM)

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