Others may have a better idea, but its been my experience that digital cameras have exposure latitude that is more similar to slide film, than to color negative film. That is to say, it is very narrow. I currently use 5 digi cams (Cannon G2, Minolta D7, Olympus C740, Nikon D-100, and Nikon D2H) and to varying degrees, have had this problem with all of them. If you are shooting a scene that has a range of tones from deep shadows to bright highlights, detail will have to be sacrificed someplace, and most cameras will expose for detail in the mid-tones, thus losing detail in both highlights and shadows. Now having rambled on about all that, what I do depends on the subject. When I shoot action, most of my work, I will try to avoid recording large blown out areas by underexposing by -0.3 to -1.7 EV. Doing this I realize I am sacrificing detail in the shadow, but this is less objectionable, in my opinion, than having huge blown out highlights. The other thing I do, is with stationary scenes I will ether bracket, with large changes in EV from + to -, or tripod shoot two exposures, one for highlight detail and one for shadow detail, and then combine the two images in post processing. This is simply what I do; others may have better ideas, and if they do, I to would be interested. In any event I dont think the addition of a UV will have any effect at all, and may increase the chance of lens flair, thus increasing the problem.