The Christie 118-100110-XX is an ultra-wide, fixed focal length lens belonging to Christie's Integrated Lens System (ILS) for their high-end 3-chip DLP projectors. With a fixed throw ratio of 0.73:1 for SX+ (SXGA+) models and 0.67:1 for HD models, it is engineered specifically for ultra-short-throw applications where the projector must be positioned extremely close to the screen. This lens is a critical solution for environments with severe space constraints, such as compact control rooms, interactive displays, rear-projection setups with minimal depth, or architectural installations where the projector needs to be nearly flush with the screen or completely concealed. The "ILS" designation indicates it is part of a precision-engineered, matched system designed to integrate seamlessly with specific Christie projector chassis for optimal optical and mechanical performance.

As a fixed lens, it prioritizes maximum light throughput and optical fidelity over flexibility. The simple optical path, free of zoom mechanics, typically allows for a large maximum aperture, which helps preserve the projector's high brightness output—a vital factor when projecting from such an acute angle where maintaining even screen illumination can be challenging. The lens is constructed with high-precision glass elements to minimize geometric distortion and maintain edge-to-edge sharpness. For system designers tackling unique spatial challenges with compatible Christie 3-chip DLP projectors, the 118-100110-XX provides the essential capability to create large, immersive images from the shortest possible throw distances, enabling creative and space-efficient visual solutions that would be impossible with standard optics.