The Hitachi FL-900 is a fixed ultra short throw projection lens engineered to enable large image displays from an extremely short distance, making it ideal for space-constrained environments like interactive classrooms, digital signage, and compact meeting rooms. With a focal length of 5.62mm and a bright F2.0 aperture, this lens allows a compatible projector to cast a sizable image—often exceeding 100 inches diagonally—from a position just a few inches away from the screen or wall, typically mounted directly above or below the projection surface. The fixed focal length means the image size is determined solely by the throw distance, requiring precise placement during installation to achieve the desired picture dimensions.

Constructed as a precision optical component, the lens utilizes high-quality glass elements and specialized coatings to deliver a sharp, bright, and geometrically consistent image across the entire screen with minimal distortion. Its ultra short throw capability fundamentally changes installation dynamics by eliminating shadows and glare from presenters, allowing for more flexible room layouts and enabling projectors to be housed in secure, enclosed mounts or within furniture. The lens attaches directly to specific Hitachi projector models via a dedicated mount, becoming a permanent part of the optical path and requiring professional calibration to ensure perfect focus and alignment.

The use of this lens is a strategic solution for overcoming spatial limitations where traditional projectors would be impractical. It facilitates cleaner installations with reduced cable runs and enables interactive whiteboard applications where users need to work directly at the screen without casting a shadow. For AV integrators and designers, the FL-900 represents a critical tool for deploying effective large-format visual displays in modern, compact environments where maximizing usable space is a priority.