"Finally there's a solution that can end the "blues" for fixed lens prosumer and entry-level digital SLR cameras at the point of capture. It's called ExpoCap from ExpoImaging. Millions of people will find digital cameras under their Christmas tree in 2005, or break them out to take holiday season photos - and a large number of those people will continue to take pictures with cool, bluish tones and poor skin color. ExpoCap is an affordable white balance filter that solves this problem by helping the camera to reproduce more pleasing and natural color than the camera's own built-in color functions can produce. The modest warming of the resulting image is similar to what is achieved by shooting through a traditional Skylight filter. Not only does ExpoCap give users natural color at capture, it saves them many hours color correcting with photo editing software."I used to see so many of these filters when I went to B&H Photo Video in New York and I could never tell which one was good vs which one was crappy in quality. I guess it all comes down to usage and experience. I have never actually used a filter because my camera does quite a good job with its white balance. Have any of you used WB filters?