A member if one of my camera clubs has been singing the praises of a Redhancer Filter (his is made by B+W) for accentuating red colors in foliage and sunsets.
I think that it is probably as efficient when shooting digital images to accentuate the reds during post processing in Photoshop. Am I correct?
It also appears to me that if you shoot on auto white balance the camera will attempt to negate any of the effects of the filter.