Build your own opaque projector.

By Steve Lodefink


Magnify and project artwork in books and computer printouts.

Photograph by Robyn Twomey

What’s an opaque projector? You know, one of those contraptions that takes flat, reflective subjects such as printed pages, leaves, or coins, and projects them onto a screen or wall. Opaque projectors were common classroom presentation tools during most of the 20th century.

Although made largely obsolete by the use of video cameras coupled to video displays, opaque projectors are still being made and sold. Marketed today mainly to art students and hobbyists for use as drawing enlargers, entry-level ...

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