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Settings for NB and/Or multi band filters with OSC camera.  

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(@the_bluester)
Molecular Cloud Customer
Joined: 2 years ago
Posts: 3
January 18, 2021 03:47  

I am looking at using either NB or dual/multi band pass filters with my OSC camera (A ZWO ASI2600MC) 

It is pretty obvious which debayer settings to use when integrating light frames, but do dark or flat frames need to be debayered using the same settings? I imagine flat frames do need to be debayered the same way as the light frames but I am not so sure about darks, are the dark frames subtracted pixel by pixel, prior to debayering?


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(@wvreeven)
Galaxy Admin
Joined: 2 years ago
Posts: 586
January 18, 2021 09:50  

@the_bluester We use dual band filters with our ASI2600MC all the time and it works great. As for debayering, depending on the imaging software you either can let APP detect the Bayer pattern automatically (which is the default) or you need to specify it in tab 0. Then just load in all lights, flats, darks and darkflats (which work better on this modern CMOS camera than bias) and let APP do its job. The calibration frames will not be debayered but used pixel by pixel. Only after all calibration frames have been applied will debayering be done.


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(@the_bluester)
Molecular Cloud Customer
Joined: 2 years ago
Posts: 3
January 18, 2021 10:55  

Actually, I have found the ASI2600 output to respond well to bias frames (Which was certainly not the case with my old ASI294) It is a real step forward as it massively simplifies shooting flats. I use Voyager for capture and being able to use bias frames instead of dark-flats means I can have it automatically shoot dawn flats for me without the constraint of needing the flats to be a fixed exposure length.


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(@wvreeven)
Galaxy Admin
Joined: 2 years ago
Posts: 586
January 18, 2021 12:04  

@the_bluester That's good to know. I use Ekos myself and with that software I find it easier to shoot darkflats. What exposure time do you use for bias?


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(@the_bluester)
Molecular Cloud Customer
Joined: 2 years ago
Posts: 3
January 18, 2021 12:11  

I set it to 0 seconds and let the camera driver sort it out.


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