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 ...

No matter how careful and clean you are with your gear, inevitably you'll get some dust, fingerprints, or other gunk on your lenses. If you're in the field or on a shoot, you might be tempted to just ...