A1: Short throw lenses help create larger pictures from shorter distances -- allowing users to create the big pictures they want, in tight spaces. Short throw lenses are commonly used in such environments as small conference rooms, small classrooms, trade show booths, and small home theaters. Long throw lenses help create smaller, more viewable images from greater distances, and are advantageous in large venues, particularly in fixed installations. Churches often require long throw lenses for worship spaces, because the projector is often mounted far away from the screen (e.g., behind the congregation). Without a long throw lens, the image would be too large.