RGB Image is Blue after RGBCombination or PixelMath additi...Can I trust filters

[fulatoro]

I am confused, when I combine my R,G and B images I get a blue background image.  How can I verify that the fits used were truly taken with the correct filters? I uploaded the fits to:

https://www.dropbox.com/sh/6tfpyda8x1qor2u/0tNFbvrpEr

Moussa

[bianry]

Uncheck this button on ScreenTransferFunction. Your image is blue because it is not background neutralized and color calibrated yet.

regards

Mats

[fulatoro]

Thank you. I did try that. I am concerned because I never ran into this issue before. The blue tint goes away once I do that but color still looks odd. This is an RGB from an SBIG8300 . I see this when I use my DSLR but this is the first time I see it with the CCD camera.  Is this normal?

Moussa

[bianry]

Background neutralization and color calibration should (in a perfect world) remove the blue tint.

regards

Mats

[fulatoro]

Thank you.  Is this common even for CCD cameras?

[bianry]

As far as I know. Yes.

regards

Mats

[Harry page]

Oh yes very common 

Harry

[fulatoro]

Thanks. First time I had to deal with it.  What is the fundamental reason for that? Sky conditions?

[lucchett]

Gradients, incorrect weights, blue leds in your observatory.

In my case it was the reflection of the ir illuminator of one ip camera over the dome of my neighbor.

Andrea