I bought a used business projector (Dell 3300MP XGA) on eBay for $350 (MSRP $1600). This is my first ever projector and I've been wanting one since the mid 1990's (not even the debut of large ...

Projection lenses play a prominent role in modern society. When combined with a projector, these lenses allow people to view two-dimensional images on a screen by magnifying them and throwing them ...