Panasonic ET EMT850 Zoom Lens (with a Throw Ratio of 4.93 8.70:1 (4:3); 4.12 7.40:1 (16:9); 4.14 7.40:1 (16:10)) for use with selected Panasonic Installation Series Projectors This product is a Zoom Lens with a throw ratio of 4.93 8.70:1 (4:3); 4.12 7.40:1 (16:9); 4.14 7.40:1 (16:10), designed for use with specified Panasonic Installation Projector... mores. Key Features of the Panasonic ET EMT850 Zoom Lens Throw Ratio: 4.93 8.70:1 (4:3) 4.12 7.40:1 (16:9) 4.14 7.40:1 (16:10) Lens Type: Zoom F Value: 1.85 2.39 Focal Distance (f): 90.30 mm 162.60 mm Dimensions (W x H x D): 173 x 130 x 336 mm Weight: Approximately 4.45 kg Compatible Projectors PT MZ11KLBEJ PT MZ11KLWEJ PT MZ14KLBEJ PT MZ14KLWEJ PT MZ17KLBEJ PT MZ17KLWEJ PT MZ20KLBEJ PT MZ20KLWEJ