Enlarger
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An enlarger is a specialized transparency projector used to produce photographic prints from film or glass negatives, or from transparencies.
Staff at William Henry Fox Talbot's commercial calotype establishment in Reading, Berkshire, England. Salted paper print from a calotype paper negative, the left component of a panoramic pair of views, 1846.
Photographic enlarger.
Enlarger lens: using the aperture ring, the photographer adjusts the iris diaphragm.
Electric timer: photographers choose exposure time.
Projector
Videos
A projector or image projector is an optical device that projects an image onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent
Acer projector, 2012
DLP type home theatre projector in use
Ancient camera obscura effect caused by balistrarias in the Castelgrande in Bellinzona
Giovanni Fontana's drawing from c. 1420 of a figure with lantern projecting a winged demon