7.2 - 10.8:1 throw ratio, project 1000" wide image from over 230m away Designed for the Optoma ZU1700, ZU1900, ZU2200 Ultra Bright DuraCore laser projectors Ideal for entertainment and large venue installations requiring maximum distance projection Full lens memory and a 1.5x Zoom enable installation flexibility Optoma's longest throw lens, the BX-CTA27 Extreme long throw lens is ideal for distance installations and large venue entertainment requiring an extra long distance from projector to screen. This lens has a throw ratio of 7.2 - 10.8:1 and can produce an image size of 50" up to 1000".