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Luminance filter problems

Astrophotography Filters
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#1 Thehagueastro

Thehagueastro

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Posted 09 May 2021 - 09:15 AM

Hi All,

 

I am at a loss and hope someone can help.  

 

I am having problems with my luminance filter photos as I see a line in the middle of the photo which I assume is from my sensor.  I have taken bias/flats/darks etc but they do not remove it during the stacking process.  Attached is a photo from a flat showing clearly the line through the middle of the photo (is this normal?) and another photo zoomed in showing the line clearly through M81.  I would have thought the line would have been corrected during the integration process - what am I doing wrong?

 

Many thanks in advance for your steer

 

Flat.jpg IMG_0473.jpg




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