Dark slide definitions

Dark slide

1) Photography equipment
Found on https://www.crosswordclues.com/clue/dark-slide

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Dark slide

[photography] In photography, a dark slide is a wooden or metal plate that covers the sensitized emulsion side of a photographic plate. In use, a pair of plates joined back to back were used with both plates covered with a dark slide. When used, the dark slide is removed for the period of the exposure and then replaced. Modern dark slides a...
Found on http://en.wikipedia.org/wiki/Dark_slide_(photography)

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Dark slide

Light-tight film holder for large format cut film.
Found on https://www.encyclo.co.uk/local/20176

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