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The new digital media raised questions about our knowledge of media history. The tactile qualities of optical toys that allow viewers to study and play with the moving image in their own hands, seem more attractive in a time when digital transformation makes the moving image less tangible. [1]
These devices date back to the mid 19th century, [1] and were a popular form of entertainment and education before the advent of moving pictures. Magic lanterns originally used rather weak light sources, like candles or oil lamps, that produced projections that were just large and strong enough to entertain small groups of people.
The magic lantern, also known by its Latin name lanterna magica, was an early type of image projector that used pictures—paintings, prints, or photographs—on transparent plates (usually made of glass), one or more lenses, and a light source.
The device incorporated a rapidly spinning shutter whose purpose—as described by Robinson in his discussion of the completed version—was to "permi[t] a flash of light so brief that [each] frame appeared to be frozen. This rapid series of apparently still frames appeared, thanks to the persistence of vision phenomenon, as a moving image."
A normal reduction in light should be expected, as a 3D lens covers the lens of the projector, but also moviegoers must wear 3D glasses. Knowing that the loss of light will occur, it’s important for filmmakers to know whether or not they want the film to be offered in 3D, so that they can make the necessary changes, to avoid converting it later.
A moving image extension of the stereoscope has a large vertically mounted drum containing a wheel upon which are mounted a series of stereographic cards which form a moving picture. The cards are restrained by a gate and when sufficient force is available to bend the card it slips past the gate and into view, obscuring the preceding picture.