When projection distance is fixed, lens choice determines whether the install feels engineered or improvised. Epson’s ProAV ELPLM15 mid zoom lens is built for installations that need controlled image sizing across longer throw distances. For WUXGA projection, it supports a 2.16 to 3.48 throw ratio on projectors under 9,000 lumens and 1.57 to 2.56 on 9,000 to 20,000 lumen models. For 4K projection, it supports a 1.52 to 2.47 throw ratio on projectors up to 20,000 lumens. That range gives AV teams room to work in large venues where projector mounting points are dictated by architecture, truss, or existing infrastructure. Instead of forcing the projector into an awkward position, the lens helps you land the image where it belongs with the right size and geometry. For enterprise environments, the ELPLM15 is a practical premium choice: it supports precise planning, reduces installation compromise, and fits the kind of high-value projection systems where performance and placement both matter.