Search found 2493 matches

by admin
Sun May 26, 2019 9:39 pm
Forum: Bug Reports
Topic: QHY168C Problems-Changing ROI Changes Gain and White Balance
Replies: 22
Views: 563

Re: QHY168C Problems-Changing ROI Changes Gain and White Balance

Hi, Can I ask why you are using a fixed power cooling option instead of setting the target temperature and letting the camera adjust the power automatically? Normally the purpose of cooling is not just to chill the camera in order to reduce thermal noise, but also to keep the sensor at a constant te...
by admin
Sun May 26, 2019 9:36 pm
Forum: General Discussions
Topic: Sharpcap Pro License
Replies: 1
Views: 29

Re: Sharpcap Pro License

Hi, The menu items like the polar alignment one do not become enabled you have opened a camera. Once you do this, you should find that they will become enabled correctly. To check that your licence has been accepted, just look at the title bar of the application, where it should now say SharpCap Pro...
by admin
Sun May 26, 2019 9:33 pm
Forum: Altair Cameras
Topic: 183C live stacking issue
Replies: 9
Views: 257

Re: 183C live stacking issue

Hi, Lots of problems like this can be caused by a misbehaving USB connection. If you go to the bug reports forum, there is a link at the top to a page on troubleshooting USB issues. Worth giving the ideas on that page a try if you haven't already. In particular getting back to the simplest setup you...
by admin
Fri May 24, 2019 3:15 pm
Forum: QHY Cameras
Topic: QHY5P-11-m problems
Replies: 1
Views: 25

Re: QHY5P-11-m problems

Hi, The first thing I'd suggest is to update if you haven't already to the very later SharpCap 3.2 .6028 and try that. It may also be worth trying 3.2 .6020, which has a slightly older version of the qhy SDK and it. Qhy have admitted that the latest version has a few new bugs that they need to iron ...
by admin
Fri May 24, 2019 3:12 pm
Forum: How do I?
Topic: Plate solve questions
Replies: 1
Views: 37

Re: Plate solve questions

Hi Chris, You can (or should be able to) sync the mount via scripting – the correct way to do this is to call the SyncTo(ra, dec) method on the mount object rather than to set the RA and DEC properties directly. SharpCap can only use external plate solvers based on the astrometry.net engine using th...
by admin
Thu May 23, 2019 7:51 pm
Forum: Bug Reports
Topic: SharpCap update quit saving images from QHY168C
Replies: 2
Views: 49

Re: SharpCap update quit saving images from QHY168C

Hi, I would certainly recommend that you try updating a newer version either 3.2.6020 or 3.2.6028 which both have updated versions of the qhy SDK (different ones too) to see if either of those give you better results. Qhy have been very active in updating their SDK over the last few months after a l...
by admin
Thu May 23, 2019 7:45 pm
Forum: Feature Suggestions
Topic: Assign colours to filters
Replies: 3
Views: 56

Re: Assign colours to filters

Okay, that makes sense now.

Let's see if we get any other votes in favour of this sort of feature

Cheers, Robin
by admin
Thu May 23, 2019 7:43 pm
Forum: Deep Sky Imaging
Topic: Understanding Dark Noise and Shot Noise
Replies: 5
Views: 99

Re: Understanding Dark Noise and Shot Noise

Hi, Yes, the effect of dark noise if you can't get rid of it will be to reduce the recommended exposure time. Since you assumed the dark noise was the same as the sky noise you end up with a factor of two at the end of the calculation. If you assume that the dark noise is a different article of the ...
by admin
Wed May 22, 2019 6:17 pm
Forum: Feature Suggestions
Topic: Assign colours to filters
Replies: 3
Views: 56

Re: Assign colours to filters

Hi,

I'm afraid I'm not quite understanding what you are trying to do here – please can you explain in a bit more detail.

Thanks, Robin
by admin
Wed May 22, 2019 6:13 pm
Forum: Deep Sky Imaging
Topic: Understanding Dark Noise and Shot Noise
Replies: 5
Views: 99

Re: Understanding Dark Noise and Shot Noise

Hi Stefan, Yes, that makes sense – although you'd fully be best off with separate terms for the sky rate and the thermal noise rate of electrons. The interesting point is that if you are adding in a significant amount of thermal noise then the shot noise will overcome the read noise even sooner (i.e...