How Are Visual Presenters Used?
Visual presenters are educational tools used for classrooms and business meetings for instructional communication. Visual presenters, better known as ELMO, are high-resolution color video cameras that are mounted on a movable arm and positioned over a large base. The educator places objects on the base and the bottom lights illuminate the object for projection. Viewers can then see the image on a TV, plasma panel, or overhead projector. This is an ideal tool for highlighting very small objects, such as insects or individual hairs, for analysis. Moving objects can be clearly displayed, as these cameras have high resolution as well as XGA reproduction at 20 frames per second. Modern systems sell between $2,000 and $4,000 and come with a USB port along with wireless remote controls.
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