The ET-DLE170 Zoom Lens from Panasonic is for use with specific Panasonic Projectors. The lens makes it possible to vary the projection distance by changing the focal distance.
Compatibility
PT-DZ870K, DZ870LK, DZ870W, DZ870LW, DW830K, DW830LK, DW830W, DW830LW, DX100K, DX100LK, DX100W, DX100LW
PT-DZ770K, DZ770LK, DZ770S, DZ770LS, DW740S, DW740LS, DW740K, DW740LK, DW730S, DW730LS, DW730K, DW730LK, DX810S, DX810LS, DX810K, DX810LK, DX800S, DX800LS, DX800K, DX800LK, DZ680K, DZ680LK, DZ680S, DZ680LS, DW640K, DW640LK, DW640S, DW640LS, DX610K, DX610LK, DX610S, DX610LS, DZ6710, DZ6710L, DZ6700, DZ6700L, DW6300S, DW6300LS, DW6300K, DW6300LK, D6000S, D6000LS, D6000K, D6000LK, D5000S, D5000LS
PT-RZ970, RZ970L, RW930, RW930L, RX110, RX110L, RZ770, DZ770L, RW730, RW730L RZ660, RZ660L, RW620, RW620L, RZ670, DZ670L, RW630, RW630L
PT-DZ780, DZ780L, DW750, DW750L, DX820, DX820L