You're knda jumping the gun here.
Zooming in or out may be relevant depending on your screen's aspect ratio, vis-a-vis how you want to handle other ARs.
Take my (constant height) setup for instance:
I use a 2.35:1 AR 110"x47" screen. I chose this size and AR because, (1). I mostly watch scope movies in my theater and (2). my room's height, width and length dictated that size. (Room dimensions usually affect the choice of screen size and AR).
When watching 2.35:1 movies, my DILA FP is zoomed out all the way - producing an image thats 110" wide and 47" tall.
Whereas when watching 16:9 or 1.85:1 fare, the projector is zoomed in all the way - producing an image thats 83.5" wide and 47" tall.
I also want to add that I would probably not be using the zoom in this manner if it weren't motorized.
|Is it best to be at one end of the range or the other or right in the middle?|
In my case, I am definetly not in the middle, but I am using the zoom at both ends of its range.
I have simplified the description of my setup, i.e. not delving into the details of how a 4:3 FP is being used with 2.35:1/16:9 screen.