Epson's Rear-Throw Zoom Lens (ELPLR05) is an interchangeable lens that works with the Pro L25000 Projector.
F Number: 2.2 Throw Ratio (200" Screen): 0.6 Lens Shift: V= +15%, H= +/-5% https://epson.com/Accessories/Projector-Accessories/Rear-Throw-Zoom-Lens-%28ELPLR05%29/p/V12H004R05