SharpCap Forums

Good luck Mark.

Systematic testing and subsequent evaluation will be time well spent.

Dave

Folks If you follow this plot at some point will you not start clipping the white point? Yes, therefore intelligent use of the histogram is required in combination with the settings. With an Altair 183C capturing at 5000x3000 I usually push it and end up with a small number of pixels at or around 10...

Don A quick Google for fresco logic usb3.0 host controller comes up with this https://answers.microsoft.com/en-us/windows/forum/windows_10-hardware-winpc/windows-10-creators-update-fresco-logic-usb3/3c1e8136-1861-411a-ba4e-ea828bc9fe55 which might be worth a read. To help progress this, please post:...

Mark I don't autoguide so it may not be possible. Don't be in a hurry to go down that route - look at the basics first. I have a Celestron AVX mount, 2nd hand, cost me £500 (£800 new). I use it without guiding. Good reasonable polar align via polarscope, careful 4 + 2 mount alignment, then All Star ...

Mark 1) yes, unity gain seems to be a good starting point but not necessarily the end point. Gain=125 looks an interesting one from your graph. 2) yes 3) exposure same that planned for lights when capturing darks 4) match dark exposure when capturing lights but you might have meant that anyway 1 - 4...

If you download and run https://www.uwe-sieber.de/usbtreeview_e.html we can soon find out the USB chipsets in the machines. Post back the graphic image in the left hand pane of the application for both machines.

Dave

Mark

Can you post a couple of example FITS Liberator images as above. Also an example of a bimodal one - I might have seen that before, I will have a hunt round in my old data. What colour space is being used?

Dave

Got that Carl. You are struggling with Renesas v1.0, things are rough here with Renesas v0.96. Useful to confirm that particular chipset is troublesome.

Dave

Mark

I am sure Brian will be along soon to enlighten you.

Dave

Mark How do I determine the best brightness level to select Brightness is ZWOspeak for offset. Have a read of this thread https://forums.sharpcap.co.uk/viewtopic.php?f=9&t=1209&start=20 around Oct 16. Create a bias frame which has a balanced histogram in FITS Liberator. For a given gain, set...