Hi, I'm new and about to purchase a projector but my question is regarding size/ratio of my screen. I see the projector specify 4x3 and 16x9 ratios, the same as Tv sets. But DVD's say all manor of different ratios. Nothing 4x3 Widescreen 16x9 cinemascope 2.35:1 1.77:1 Full frame etc. Do they all come out 16X9 ? Or will I sometimes get black bands at top and bottom, as sometimes happens on Tv ? I think the later could well be the case, in which case what is the widest ratio that is used ?