0.84 - 1.02:1 throw ratio, project images up to 1000" from 18m with the BX-CTA18 lens Designed for the Optoma ZU1700, ZU1900, ZU2200 Ultra Bright DuraCore laser projectors 1.2x Motorized Zoom for flexible and simple installations Motorized Zoom & Motorized Lens Shift Memory adds flexibility and ease of install. The BX-CTA18 short throw lens is ideal for rental installations or permanent install applications within the entertainment or museum sectors. Motorized Lens shift memory and Motorized Zoom add to the lens's use-case flexibility and easy installation. With a throw ratio of 0.84 - 1.02:1, easily produce images in size of 50" up to 1000