Search found 11 matches

by Topographic
Sat Apr 25, 2020 9:06 am
Forum: Deep Sky Imaging
Topic: Target Magnitude and Smart Histogram
Replies: 1
Views: 800

Target Magnitude and Smart Histogram

Trying to get my head around the Smart Histogram (again). If I point at a dark area of sky, use the recommended settings and photograph M42, the results compared to photgraphing M1 would be different due to the magnitude difference of the target. Is it the case that the image then depends on the num...
by Topographic
Sat Apr 04, 2020 2:10 pm
Forum: General Discussions
Topic: Daytime Focusing using OAG
Replies: 2
Views: 903

Re: Daytime Focusing using OAG

Thanks Robin

Should do the trick.

David
by Topographic
Fri Apr 03, 2020 9:28 am
Forum: General Discussions
Topic: Daytime Focusing using OAG
Replies: 2
Views: 903

Daytime Focusing using OAG

Hi I currently have a focus routine where I focus on a concrete electricity pole with may main camera and then with my guide camera in the OAG with its helical focuser. I do this in the afternoon prior to an evening session. However I am thinking of attaching a ZWO EAF, is there a way I can still do...
by Topographic
Mon Mar 30, 2020 6:41 pm
Forum: Tutorials
Topic: Sky Background Calculator and Quantum Efficiency
Replies: 5
Views: 3536

Re: Sky Background Calculator and Quantum Efficiency

Robin

I assumed a lower than 'peak' efficiency (-10%).

thanks

Daid
by Topographic
Mon Mar 30, 2020 10:39 am
Forum: Tutorials
Topic: Sky Background Calculator and Quantum Efficiency
Replies: 5
Views: 3536

Sky Background Calculator and Quantum Efficiency

Hi

I am using the ZWO ASI 183MC Pro, the only figure I have for QE is 84% (mono sensor). Do I enter this and then select the colour button?

Thanks

David
by Topographic
Thu Mar 26, 2020 12:53 pm
Forum: Bug Reports
Topic: Histogram failure
Replies: 7
Views: 1804

Re: Histogram failure

Robin

I am in bortle 3 area. Last night I just had an IR/UV cut filter. It ran 10 x 30 second exposures and still no result.

thanks

David
by Topographic
Wed Mar 25, 2020 9:28 pm
Forum: Bug Reports
Topic: Histogram failure
Replies: 7
Views: 1804

Re: Histogram failure

Tried again tonight, just goes through the exposures until 30 seconds and then just takes multiple exposures with no result. Couldn't cancel it. Had to reload Sharpcap to try again with an estimated sky brightness figure entered. The calculation worked.
by Topographic
Wed Mar 25, 2020 10:41 am
Forum: Bug Reports
Topic: Histogram failure
Replies: 7
Views: 1804

Histogram failure

version 3.2.6248.0 ZWO 183mc-Pro Windows 10 log Info: 11:27:52.7674075 Thread:#1 SharpCap.Program.Main() :: Starting... Info: 11:27:53.7984395 Thread:#1 SharpCap.Program.SetupNBUG() :: Setting up bug reporting. Info: 11:27:53.8296876 Thread:#1 SharpCap.LogSystemInfo.Run() :: Starting thread to log s...
by Topographic
Sat Feb 22, 2020 3:37 pm
Forum: Deep Sky Imaging
Topic: Histogram sky brightness measurement
Replies: 4
Views: 1688

Histogram sky brightness measurement

Just a thought: if you are targeting one object for the night would there be any advantage to measuring whilst aiming at that part of the sky or am I missing something. By no means a rarity.

If not do you have a favourite location for measurement?
by Topographic
Fri Nov 15, 2019 9:47 pm
Forum: Deep Sky Imaging
Topic: Smart Histogram and Focal Ratio
Replies: 6
Views: 1980

Re: Smart Histogram and Focal Ratio

Well obviously :lol:

I thought that there was some relationship but never saw anything written down.

The potential for shorter subs is a joy to those of us whose age brings with it less efficient bladders and, other such inconveniences. :oops: