JACK OF ALL TRADES. The Pro5000SL is the perfect companion for difficult installation requiring a variety of lens throw ratio options. Starting from a 1.8:1 throw ratio and going clear to a 4.1:1 throw ratio, we make the projector work for your room, and not your room work for the projector. Our ISF Certified Service Center installs the lens of your choice upon order confirmation; of course free of charge like our technical support (for the lifetime of your product). Additional features of this flexible unit are a built-in email monitoring system, internet control of the projector through LAN, and at 5000 ANSI lumens, you can be assured to have a crisp and detailed image.