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a problem with Darks

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#1 LoveChina61

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Posted 17 September 2021 - 03:15 PM

I just purchased a SBIG 2000xm secondhand and found the following problems with the Clear filter's darks (2 minute Dark at -5 degrees). I had similar results with the Red, Green, and Blue filters. What could be causing this problem?

 

Thanks,

 

Mike

 

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#2 ChiTownXring

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Posted 17 September 2021 - 03:35 PM

I don't own the SBIG but since this is happening with all of the filters, are the filters centering to your cameras sensor when you rotate them around. Did the SBIG come with the filters or did you use your own?


Edited by ChiTownXring, 17 September 2021 - 03:36 PM.

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#3 idclimber

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Posted 17 September 2021 - 04:25 PM

Assuming that you are really taking darks, that looks like a light leak to me. 


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#4 LoveChina61

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Posted 18 September 2021 - 02:02 PM

Thanks for your comments. I am quite familiar with the CCDOps software that comes with this camera as I used its sister "one-shot color" camera the 2000xcm for many years. I am definitely taking the Darks correctly. It looks like the filters are lining up correctly but I haven't taken it apart to examine it.

 

I wonder what could be causing the light leak. Do the shutters on these cameras often go bad?

 

Mike



#5 LoveChina61

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Posted 19 September 2021 - 06:40 AM

I am wondering if this missing pin on the CFW8-to-camera connector (bottom right corner of connector plug) has something to do with it? Sometimes the manufacturers will leave a pin off of the connector if it has no use anyways.

 

If someone out that has the CFW-8 filter wheel and can check their connector plug for me, I would appreciate it very much!  Mike

 

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