4 - 7.2:1 throw ratio, project 1000" wide image from over 150m away Designed for the Optoma ZU1700, ZU1900, ZU2200 Ultra Bright DuraCore laser projectors Perfect for entertainment and large venue installations & building projection Full lens memory and a flexible 1.8x Zoom enable installation flexibility. The BX-CTA23 ultra long throw lens is ideal for distance installations and live venue entertainment requiring a long distance from projector to screen. This lens has a throw ratio of 4 - 7.2:1 and can produce an image size of 50" up to 1000