gfletcher Posted April 7, 2016 Share Posted April 7, 2016 Hi guys I have an unmodded 450D which I have fitted an Astronomik CLS clip filter. I took some sample images using my Canon 50mm lens set at f2.5 The resultant lights came out with an extremely mid blue background. I put the 5 light frames through deep sky stacked and the resultant tiff image was still quite a mid blue background. Is this normal when using a CLS filter and if so how do i get rid of the blue background when I post process in Photoshop CS6 ? Thanks GRAHAM Link to comment Share on other sites More sharing options...
+Graham Posted April 7, 2016 Share Posted April 7, 2016 Graham are you shooting these frames in Raw mode. If not you need to change to it. Link to comment Share on other sites More sharing options...
Werisit Posted April 7, 2016 Share Posted April 7, 2016 Agree with Graham. Shooting in RAW will let you play with colour balance on your subs. Link to comment Share on other sites More sharing options...
gfletcher Posted April 7, 2016 Author Share Posted April 7, 2016 Yes I am shooting in RAW. what is the procedure in Photoshop to get rid of this blue colour cast that has been produced by using the CLS filter? Link to comment Share on other sites More sharing options...
+Graham Posted April 8, 2016 Share Posted April 8, 2016 If you open your stacked image in Photo shop. Click on the image tab. From the drop down menu select - adjustments another drop down will appear select - selective colour It will open a box with RED pre selected in the little box. Click on the arrow and a list of colours will drop down. Select BLUE and adjust the sliders until you are happy with the result. Link to comment Share on other sites More sharing options...
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