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Should Calibration Frame Binning Match Light Frame Binning?

astrophotography
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#1 jgv

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Posted 24 April 2019 - 09:22 PM

Hello,

 

I have recently purchased a ZWO ASI1600MM Pro camera for use with a TPO 8" RC scope.  I plan on using 2x2 binning for image capture.  When I acquire dark, flat, and dark-flat frames, should I also use 2x2 binning?

 

Thanks,

jim



#2 AZ Maverick

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Posted 24 April 2019 - 09:30 PM

I'm a newbie at this too.

I also just bought an ASI1600MM Pro.

I match my flats/darks to the same bin as my imaging shots.

IE, yes I have a set of flats/darks for my bin1x1 images and a set of flats/darks for my bin2x2 images.

I have been shooting my Lum and Ha channels at bin1x1 and my RGB channels at bin2x2.



#3 Ken Sturrock

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Posted 24 April 2019 - 09:36 PM

Sure. Think through what these frames do. Dark and bias frames deal with pixels, so they have to match the pixels in your light frames. Even though flats are more about patterns, most software programs will complain if the frames exhibit different geometries.


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#4 Alex McConahay

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Posted 24 April 2019 - 10:34 PM

Each individual pixel in a calibration frame is there to correct the corresponding pixel in a light frame. You must match them pixel to pixel. That is why you cannot DeBayer before calibration, among other things.  

 

Alex


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#5 jgv

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Posted 24 April 2019 - 11:30 PM

Thanks to everyone for the helpful explanations.  --jim




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