The NEC NP31ZL is a powerful short zoom projector lens designed to provide installation flexibility for a range of NEC's high-performance projectors. This lens offers a variable throw ratio of 0.75 to 0.93:1, making it an excellent choice for environments where a large image is required from a very short distance. This is particularly useful in tight spaces such as small conference rooms, classrooms, or rear projection applications where traditional lenses would require the projector to be much farther from the screen.

Key to its versatility is the zoom capability, which allows installers to fine-tune the image size and position without having to physically move the projector unit itself. This feature simplifies setup and alignment, ensuring that the desired image perfectly fits the screen. It is compatible with several NEC PA and PX series projectors, a wide range of professional-grade equipment, further enhancing its utility in commercial AV setups. The robust construction and high-quality optics ensure reliable performance and sharp, clear image projection for professional use.