Short throw ratio for flexible installation in narrow spacesA short throw ratio of approximately 0.8-1.0:1 adds flexibility for installation in narrow spaces. The powered zoom/focus/lens shift features allow convenient setup by remote control. Can be used with the PT-EZ770 series and PT-EZ580 series of panasonic LCD projectors.The ideal short throw lens for highly versatile projectionIdeal for a wide range of applications. the Panasonic ET-ELW22 short throw zoom lens is ideal for a wide range of applications including: Large/medium classrooms. Seminar rooms. Museum/exhibition halls. and Shows.