When used with the RoadRunner and Vivid products or LU77 projectors this lens has a 7.0:1 long throw ratio. If used with the LX+58, LX66 or LX66A, the lens will provide a 8.9:1 long throw ratio. If used with the LW40(U) projectors, this lens will provide a 9.5:1 throw ratio.

Please refer to the Christie Lens Calculator on this website or the downloadable PDF throw distance chart located in the resource tab of this lens option or the resource tab of Christie projector to be used with this lens.