The Standard Zoom Lens from Christie features a throw ratio of 1.22 to 1.53, a focal length of 18.07 to 22.59mm, and an aperture of f/2-2.32. With a 1.25x zoom ratio, this lens is suitable for use with 555-GS Series and 599-GS Series Projector
Note:
Not recommended for 700/850-GS Series projectors or for use with brighter products with luminous flux of more than 6500 lumens (ISO).