The motorized zoom lens allows to vary projection distance by adjusting the focal distance. It has a standard-throw ratio of 0.8 to 1.0:1 that fluctuates depending on the aspect ratio of the projector. ET-DLE085 Features: Power Zoom Lens, Designed for 1-Chip DLP&trade Projectors, Focal Length: 11.8 to 14.6mm, Varies Projection Distance, - By Adjusting the Focal Distance, F 1.85 - 2.20 Aperture, Optical Zoom: 1.2x, Throw Ratio: 0.8 to 1.0:1, Quality Optics Maintains High-resolution Imagery, Works With The Following Models: PT DW830 PT-DX100 PT-DW830E PT-DX100EK PT-DX100ELK PT-DZ870 PT-DZ870E"
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