Your lens determines image sharpness, throw ratio, aspect ratio and maximum picture size. Fixed lenses are cheap and portable; zoom adds size flexibility; lens shift eases placement. Protect and clean ...

If you're thinking about adding a projector to your home, DIY site Instructables has a step-by-step guide on how to create your own functional projector for much less than you would ever pay retail.

Swapping out a lens on a projector shouldn’t be that difficult, but even Digital Projection Inc. offers some quick tips to make it go smoother as part of its DPI University video training series. Ken ...

The F-number of a photographic lens is a measure of its light-gathering ability, and is expressed as its aperture diameter divided by its focal length. Lenses with low F-numbers are prized by ...

Anthony is a Toronto-based communications specialist with degrees in history and journalism who loves to use his research and interview skills to inform and entertain. He has over a decade of ...