I purchased the 24-120 f4, and just received it. B&H is selling the lens with two filters, essentially give aways. The UV is going to sit in my camera junk pile, but I also got a cir polarizer, Luminesque. I am not familiar with the name at all. The interesting thing is that both filters n have narrow barrels, I guess designed for wide angle lenses. I have several lenses that could benefit from such a filter. I'm going to try the polarizer out, but I'm wondering if anybody has had experience with this brand? I am a B+W user. They also make a narrow filter for wide angle lenses, but they are a hell of a lot more expensive than free. Anybody with experience with this brand filter?