Epson ELPLU04 Ultra Short Throw (1:1) projector lens EQUIVALENT ***ALL GLASS***A SUPER GREAT DEAL! THIS IS AN EQUIVALENT, HIGH QUALITY , ALL GLASS LENS (NOT PLASTIC LIKE FACTORY EPSON LENSES) THAT CAN BE USED IN PLACE OF THE ELPLU04 BUT AT A MUCH LOWER PRICE. THE MAIN DIFFERENCE IS THAT THE FOCUS IS ADJUSTED MANUALLY BY HAND. ITS FIXED AT 1:1 AND GIVES YOU LOTS OF LENS SHIFT. IT ALSO HAS DEFORMATION ADJUSTMENT. IT'S COMPATIBLE WITH PROJECTORS THAT ARE 8500 LUMENS AND UNDER AS I BELIEVE BRIGHTER EPSONS HAVE A SENSOR WHICH HAS TO "TALK" TO THE LENS ELECTRONICALLY. 30 DAY WARRANTY IN CASE THE LENS DOESN'T WORK OUT FOR YOU.PLEASE SEE THE PICTURE OF THIS LENS INSTALLED IN A UNIT.THE PROJECTOR IN THE PHOTO IS NOT INCLUDED.