The NEC NP4100 With NP08ZL Lens is one of five projector and lens packages put together for your convenience. The NP4100 is normally sold without a lens. NEC makes a line of five quick-mount bayonet lenses and you can purchase each one separately. Since you need at least one lens to have a working projector, NEC paired the NP4100 with each of its five lenses.
This particular package pairs the NP4100 with the NP08ZL 1.78 – 2.35:1 zoom lens. A zoom lens allows you to vary the size of the projected image without moving the projector. But the flexibility of the NP4100 goes far beyond its lenses.