Good lenses are far more expensive than filters; therefore, it makes good sense to attach a filter to protect the lens’ sensitive front element. In order for this lens protection not to add a permanent filter effect, the protective filter should consist of clear, completely colorless glass with the highest possible transparency. These are the precise characteristics of the B+W Clear (007M) Filter. The extremely hard MRC coating, capable of repelling both water and dirt, assists in lens protection, as well as, in the cleanup of the accidental fingerprint or occasional surface dust. This is extremely important with digital cameras, whose picture quality is much more sensitive to dirt.