[frank]

Thank you both, BC and Wim. Now I understand it: using a colour filter on a RGB DSLR doesn't make much sense and it causes loose of light and information.



I was curious about this question because I found that the colour filters in NX2 (and in Color Efex as well) do not work very well, in particular the red colour filter cannot give me the dramatic sky-cloud effect as seen in for example Adam's work who used red filters to get the effect. I know there are other ways in NX2 to get the similar effect but the method is not quite straightforward, for example using the Color Control Point technique.



Best regards,

Frank