|
Hi Col,
I have been experimenting with an NBP fiter recently for imaging - it also produces a color cast. To get back to a "natural" colour balance I have found using the RGB curves in PS to be the most effective - adjust the curves so the peaks for each color are at the same point on the x-axis and the colours seems to be "natural". There may be better ways - eg use of a standard "white" star in the image (gv2 class) or using a white/grey card and setting your camera to use the reference shot for a custom color balance.
Hope you do not mind but I have had a quick got at re-processing your image to get it close using this technique (and got rid of the vignetting with a synthetic flat)...
|