Hello: Will be ordering 2 XCD lenses shortly. I never cheap out on filters and have always purchased brass-threaded B+W, UV and Polascreens. The 72mm UV filters are pricey, at about $60 @. The Hasselblad UV filters are around $250 @. IS there any noticeable difference in optical quality from either brand of filter? I won't shoot any lens without a protective filter attached, so don't go there!