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--- Forwarded Message from [log in to unmask] --- >From: [log in to unmask] >Date: Fri, 6 Apr 2001 09:50:45 -0400 >To: [log in to unmask] >Subject: Re: #6049 Document Camera Most document cameras have comparable features. Here are some basics you might consider: - capable of transmitting any visual image - allows for two and three dimensional objects - camera operable in low light conditions - variable focus ability - zoom - keystone correction feature - handles NTSC, as well as foreign standards (PAL, SECAM) - 135 degree tilt (so you can use for head shots as well as documents) Another feature on which to compare similar models is the bulb - brightness & bulb life factors - double-port for on-the-fly switching when a bulb burns out Also consider the output of the projected image (expressed in lumens) Finally, for an all-purpose machine, depending on budget and intended use: - auxiliary inputs (for throughput of video signal from other sources such as vcr or computer) - sound-handling capability it never hurts to have PA ability happy shopping! bruce Bruce Parkhurst Boston University