2.9 - 5.52:1 throw ratio, project 1000" wide image from over 115m away Designed for the Optoma ZU1300, ZU1100, ZU1050, ZU860, ZU750 and ZU660e DuraCore laser projectors Perfect for entertainment installations & building projection Enables installations in live venue installations where distance projection is needed The BX-CTA13 ultra long throw lens is ideal for distance installations and live venue entertainment which require a long distance from projector to screen. This lens has a throw ratio of 2.9 - 5.52:1 and can produce an image size of 50" up to 1000".