The Christie 104-115101-XX is a premium, high-performance zoom lens designed for compatibility with select Christie DLP projectors, particularly those in the SX+ and HD series. It is engineered to provide exceptional optical flexibility for large-venue applications where projector placement relative to the screen may vary or require precise image sizing. This lens features two distinct, optimized zoom ranges: a 4.5-7.5:1 ratio for SX+ resolution projectors and a 4.1-6.9:1 ratio for HD models. This dual specification indicates a specialized optical design calibrated to maximize the native pixel structure and light output of each projector type, ensuring edge-to-edge sharpness, minimal geometric distortion, and maximum light transmission for the given chipset. The versatile zoom capability allows installers to fine-tune the image size over a significant range without physically relocating the projector, which is invaluable in fixed installations like auditoriums, command centers, and planetariums where the throw distance is constrained by architecture.

Constructed with precision-ground glass elements featuring multi-layer anti-reflective coatings, the lens is built to preserve the high contrast, color fidelity, and brightness inherent to Christie's three-chip DLP systems. The internal design manages the intense luminous flux from high-wattage xenon or laser light sources without introducing chromatic aberration or significant light fall-off, delivering a uniformly bright and crisp image across the entire screen. The lens incorporates motorized zoom and focus functions, which can be controlled remotely from the projector's menu or control system, allowing for precise calibration after installation. This remote adjustability is crucial when the projector is mounted in a difficult-to-access location, enabling technicians to make final optical adjustments from a position at the screen for optimal results.

As a dedicated accessory, the lens integrates seamlessly with compatible Christie projectors via a secure bayonet mount, often featuring electronic identification that allows the projector to automatically recognize the lens model and apply the correct configuration profile. This automated setup streamulates installation by correcting for inherent optical characteristics and optimizing performance. Housed in a robust metal barrel, the lens is designed for durability and long-term alignment stability under the thermal stresses of high-brightness operation. For system integrators, the Christie ILS 4.5-7.5:1 / 4.1-6.9:1 zoom lens represents a critical investment in optical quality, providing the necessary throw flexibility and image performance to fully realize the projector's capabilities in demanding professional environments.