Search found 33 matches

by SteveJP
Thu Dec 27, 2018 10:22 pm
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 14856

Re: Another Offset Question

Steve Well, as it happens, I do have that option checked since It needs to be unchecked unless you are doing astrometry. Have a look at this thread https://forums.sharpcap.co.uk/viewtopic.php?t=1108 where I describe the use of the batch processing facility in ImageJ to resolve (thanks to @oopfan fo...
by SteveJP
Thu Dec 27, 2018 4:32 am
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 14856

Re: Another Offset Question

This is the correct third image
1ms_G90+250_Off40X.PNG
1ms_G90+250_Off40X.PNG (39.16 KiB) Viewed 1555 times
by SteveJP
Thu Dec 27, 2018 4:22 am
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 14856

Re: Another Offset Question

Thanks Robin, That's a great explanation - I think I really get it now. Being a bit of a geek, I really feel I need to understand the underlying mechanism. To that end, I've been running a few experiments here. These are all graphs made from the histogram SharpCap outputs. All are 1ms darks. The fir...
by SteveJP
Thu Dec 27, 2018 2:41 am
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 14856

Re: Another Offset Question

Thanks for that Robin - you did far more than you should have given your current medical condition. Steve - in File > SharpCap Settings > General Tab , what is the state of Save 10/12/14 bit images in FITS files without stretching to 16-bit ? If this is checked, then it needs unchecking for normal ...
by SteveJP
Thu Dec 27, 2018 1:59 am
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 14856

Re: Another Offset Question

Hi Robin,
I'm still working though your very comprehensive answer. I'll reply properly soon.
Steve'
by SteveJP
Thu Dec 27, 2018 12:44 am
Forum: Scripting
Topic: Anomaly with RestartPreview command
Replies: 4
Views: 1619

Re: Anomaly with RestartPreview command

Hi Steve, for now I'd suggest looking for a workaround to find an alternative way of achieving your goal without using the restart preview option. For instance you might try doubling the exposure value (which should cause the current frame to be dropped in a new frame to be started) and then settin...
by SteveJP
Mon Dec 24, 2018 2:45 am
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 14856

Re: Another Offset Question

Steve Centralised histograms are in the images in post Dec 22nd 11:20pm. I obtained centralised histograms on the 183 cameras by adjusting offset. At least I have a systematic method now to arrive at a sensible offset setting - better than the all too common 'play around with the sliders'. The 183s...
by SteveJP
Sun Dec 23, 2018 11:48 pm
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 14856

Re: Another Offset Question

Hi Dave, I'm not sure what you mean by centralising the Histogram. The horizontal scale goes to 2^14-1 (16383), this being a 14 bit camera, I just ommited that picture there being not much to see. (Being just a photo of the inside of the lense cap!) If you integrate under the curve, you'll get 16M, ...
by SteveJP
Sun Dec 23, 2018 11:04 pm
Forum: Scripting
Topic: Anomaly with RestartPreview command
Replies: 4
Views: 1619

Re: Anomaly with RestartPreview command

Hi Steve, for now I'd suggest looking for a workaround to find an alternative way of achieving your goal without using the restart preview option. For instance you might try doubling the exposure value (which should cause the current frame to be dropped in a new frame to be started) and then settin...
by SteveJP
Sun Dec 23, 2018 12:08 pm
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 14856

Re: Another Offset Question

... adding two pictures in-line didn't seem to work - here is the other one
SC-Hist-Plot.PNG
SC-Hist-Plot.PNG (24.37 KiB) Viewed 1478 times