When the projector must stay far from the screen, optical precision becomes the difference between a workable install and a compromised one. The Optoma BX-CTA13 ultra long throw lens is built for distance projection, delivering a 2.9-5.52:1 throw ratio and the reach needed for large venues, building projection, and live event environments. This lens is designed for Optoma ZU1300, ZU1100, ZU1050, ZU860, ZU750, and ZU660e DuraCore laser projectors. It can project a 1,000" wide image from over 115 m, giving AV teams the flexibility to place the projector out of the audience sightline, away from stage traffic, or in architecturally constrained locations. For integrators, the value is clear: fewer placement compromises, better control over long-distance image delivery, and a lens matched to high-output laser projection systems. In venues where image size, throw distance, and sightline management all matter, the BX-CTA13 supports the kind of installation that cheaper optics cannot reliably handle.