Epson's Middle-Throw #1 Zoom Lens (ELPLM12) is an interchangeable lens that works with the Pro L25000 Projector.
F Number: 1.9 - 2.1 Throw Ratio (200" Screen): 1.74 - 2.35 Lens Shift: V= +65%, H= +/-30%
https://epson.com/Accessories/Projector-Accessories/Middle-Throw-%231-Zoom-Lens-%28ELPLM12%29/p/V12H004M0C