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v.3.1.4608 twitching
Posted: Fri Nov 03, 2017 11:52 pm
by donboy
Just that - the image twitches. Using QHY5L-II with Win 10 Pro.
Don
Re: v.3.1.4608 twitching
Posted: Sat Nov 04, 2017 3:34 pm
by admin
By twitching do you mean the image jumping horizontally or vertically? Or do you mean it not updating smoothly so that it has a jerky look when viewing?
I can't actually recommend using the QHY5LII cameras with SharpCap 3 or 3.1 (possibly even 2.9) as there is a bug in the recent version of the QHY SDK for these cameras that means that the gain is always too high (low gains are not accessible - no matter the position of the gain control). I think you have to go back to SharpCap 2.8 to get a version where the gain control on these cameras works properly.
cheers,
Robin
Re: v.3.1.4608 twitching
Posted: Sat Nov 04, 2017 5:12 pm
by donboy
Robin,
I never have had an issue with the QHY5L-II with SC. I use it all the time to do polar alignment when the imaging camera won't do.
The image moves horizontally in a twitching motion.
Don
Re: v.3.1.4608 twitching
Posted: Sat Nov 04, 2017 5:42 pm
by admin
Ah that's ok then, you'll be fine with high gain for polar alignment. It's people who want the lower gain levels that have a problem...
Not seen the horizontal jumps myself - did they happen in 4602? That had the previous QHY SDK in, and if that version was good then it's a bug in the new SDK.
cheers,
Robin
Re: v.3.1.4608 twitching
Posted: Sat Nov 04, 2017 7:07 pm
by donboy
Didn't happen in previous version and I haven't updated the SDK for the QHY5L-II. We won't have skies for a several days so I'll try and duplicate with a daytime image and see if it is QHY combo or with one of my other cameras. I'll also download the software and reinstall.
Don
Re: v.3.1.4608 twitching
Posted: Sat Nov 04, 2017 9:00 pm
by donboy
Just retested and the twitching is just with the QHY5L-IIm and not my other cameras and with only this version 3.1.4680. It is most apparent at 1/8 to 1/2 sec although it does it at shorter and longer exposures but not as apparent.
Atleast I can use the camera with the previous versions so no biggy.
Don
Re: v.3.1.4608 twitching
Posted: Sat Nov 04, 2017 9:39 pm
by admin
Ok, just tested with my QHY5II-C and with the latest SDK I see a purple bar down the right of the image and it jumps to the right/left about 2 pixels when the 'speed' control is set to 1 or 2 - it's OK on speed zero. I don't see the problem with previous SDK versions.
Does this agree with what you are seeing?
cheers,
Robin
Re: v.3.1.4608 twitching
Posted: Sun Nov 05, 2017 3:58 pm
by admin
Reported to QHY.
cheers,
Robin
Re: v.3.1.4608 twitching
Posted: Mon Nov 06, 2017 7:35 pm
by donboy
Yes Robin it agrees with what I see.
Thanks,
Don