At least in my copy, the coating is clear red / brownish. In some regions and especially for sunsets that fits great, but there are certainly designs where this is not appropriate. To what extent can the fix with the white balance, I do not know, since I only use the filter as where he fits.
The shading is strong, so that the filter can be used well for strong backlight / contrast situations, the attached image was so out of the camera. Without filter would be in the light situation, either the sky or the overexposed foreground black.
My conclusion:. I'll keep it because I like the effect of including color shift will, however, buy me another, neutral Grauverlauffilter to
