Hi! Ill be soon buying a 50mm for street photography and candid shots. I wanna get used to it and make it my "standard" focal length for when I have to take just one fast prime lens. Well, my question is this: Should I get a regular UV filter or a CP filter? I dont want to change filters, I want only one, leave it there and forget about it. So, do you think CP filter would bring me any advantages for the kind of work I want to do?