All projectors can zoom, but you need a zoom ratio of 1.33 or greater, preferably a little more just to be sure you're outside of the range of tolerances and not using the extremes of the lens.
If you went the anamorphic lens route, then either the pj or an external scaler needs to be able to stretch the image vertically to remove the black bars encoded in the source. The A lens also needs to be big enough to work with the pj it's paired with, but usualy the manufacturer can tell you that if no one here can.
Originally Posted by elmalloc
Who says Cameron is "right" and why do we care about him so much - lol!
I trust Gary Lightfoot more than James Cameron.