New User Problem with Darks

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rchozick
Posts: 7
Joined: Tue Jul 30, 2019 4:56 pm

New User Problem with Darks

Post by rchozick » Wed Jul 31, 2019 6:05 am

I just got my ASI294 Pro and have some mixed results. I took some 3 minute subs and darks and flats and they came out very well. My 5 minute subs had some strange problems. The 5 min subs look good out of the camera and did fine with flats but when I added the darks they were messed up. I have some pics below to show this. I am a Mac user with Nebulosity 4.3. I did the 3 min subs at an offset of 10 and the 5 min subs at an offset of 8. I tried 8 at first but decided to go to 10. On the Mac it appears as if you have to set offset in Nebulosity. I used Craig Starks method to determine offset and decided on 10 but my first set was 8. I am setting gain at 120 for everything. My 3 min subs darks were the same gain and the offset of 10 and for the problem 5 min subs I did the darks at 8. I am assuming darks and lights have to agree on offset, temp and gain. All were done a -10C. A separate problem happened with a batch of subs taken that show the same problems with the subs themselves, not just when calibrated with the darks. I have attached pictures of each issue. I am trying to determine what is going on here.

All were debayered, stretched and auto color corrected in Nebulosity.
ASI294 3m well calibrated small.jpg
These 3m subs calibrated great
ASI294 5m poorly calibrated small.jpg
These 5 min subs were the ones that did not do well with the darks but looked great with flats but no darks
ASI294 3m sub not calibrated with darks or flats small.jpg
These are the ones that were messed up as taken

rchozick
Posts: 7
Joined: Tue Jul 30, 2019 4:56 pm

Re: New User Problem with Darks

Post by rchozick » Wed Jul 31, 2019 6:07 am

I could only add 3 files in my post. Here is the 5 min sub that would not take darks but looked fine without but has the amp glow.
ASI294 5m sub not calibrated with darks or flats small.jpg
5 min sub with only flats but darks messed it up

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Sam
Posts: 2780
Joined: Thu Feb 21, 2013 2:51 am

Re: New User Problem with Darks

Post by Sam » Wed Jul 31, 2019 10:37 am

you can upload the raw image for us to check
did you take the darks after light?
if not, you can try to do like this again
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rchozick
Posts: 7
Joined: Tue Jul 30, 2019 4:56 pm

Re: New User Problem with Darks

Post by rchozick » Wed Jul 31, 2019 1:27 pm

How do I upload a Fit file. It is 25mb.

rchozick
Posts: 7
Joined: Tue Jul 30, 2019 4:56 pm

Re: New User Problem with Darks

Post by rchozick » Wed Jul 31, 2019 2:12 pm

I emailed the 5 min Fit file to the support email.

rchozick
Posts: 7
Joined: Tue Jul 30, 2019 4:56 pm

Re: New User Problem with Darks

Post by rchozick » Wed Jul 31, 2019 3:35 pm

I have noticed my darks are each very different in ADU. The high end varies from 1400 to 2800. Is that normal? My CCD camera has virtually the exact numbers for each frame. Could this be a sign this camera has some electronic issues causing variability?

Katherine.Tsai
Posts: 194
Joined: Fri Dec 07, 2018 10:24 am

Re: New User Problem with Darks

Post by Katherine.Tsai » Thu Aug 01, 2019 7:02 am

Hi Robert,
We received your file in support mailbox, please also attache the dark files.
Shall we keep in touch via email?

rchozick
Posts: 7
Joined: Tue Jul 30, 2019 4:56 pm

Re: New User Problem with Darks

Post by rchozick » Fri Aug 02, 2019 1:09 pm

No one is responding to me in support.

Katherine.Tsai
Posts: 194
Joined: Fri Dec 07, 2018 10:24 am

Re: New User Problem with Darks

Post by Katherine.Tsai » Thu Aug 08, 2019 9:01 am

Hi Sir,

I think support has respond to you now.

Please turn up the offset anfd try again.

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