I've been trying to find some more info about lens resolution and ccd's. For example if there is a 100megapixel ccd, what good does that do if the lens only resolves 40 megapixels? Is this a roadblock that digital is about to hit? Anyone know how many 'pixels' a lens can resolve on a ccd the size of a MF film back? Does film already exceed the maximum resolution of the lens?