The Hitachi ML-904 is a mid-range zoom lens designed for specific Hitachi projector models, offering a versatile 2.5-3.8:1 zoom ratio that provides significant flexibility in projector placement. This range allows the image size to be adjusted substantially without the need to physically relocate the projector after its initial mounting, which is a critical advantage for installations in multi-purpose rooms, larger classrooms, or venues where the exact screen size or throw distance may vary. The "Middle Zoom" designation indicates it offers more adjustment range than a standard short zoom lens, making it a practical choice for environments where the projector's location is somewhat fixed but requires a wider range of sizing options to accommodate different screen setups or room layouts.

Engineered to maintain optical compatibility with its designated Hitachi projector, the ML-904 ensures that image sharpness, brightness uniformity, and color accuracy are preserved across the entire zoom spectrum. The lens is constructed with quality glass elements within a durable housing, built for reliable performance in commercial and institutional settings. It includes manual zoom and focus controls for precise calibration during installation. For system integrators, the Hitachi ML-904 provides a valuable tool that bridges the gap between limited-adjustment lenses and more complex high-ratio zooms, delivering the necessary flexibility to achieve a perfectly sized image from a broader selection of potential mounting positions within a venue.