BenQ MW612 Quick Start Guide - Page 6

Projection dimensions MS610/MX611 The screen aspect ratio is 4:3 and the projected picture is in a 4:3 aspect ratio • To optimize your projection quality, we suggest you do the projection within non-gray area. • All measurements are approximate and may vary from the actual sizes. BenQ recommends that if you intend to permanently install the projector, you should physically test the projection size and distance using the actual projector in situ before you permanently install it, so as to make allowance for this projector's optical characteristics. This will help you determine the exact mounting position so that it best suits your installation location.