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. Salted paper print from a calotype paper negative, the left component of a panoramic pair of views, 1846.
Photographic enlarger.
Durst color enlarger
Enlarger lens: using the aperture ring, the photographer adjusts the iris diaphragm.
Photographic film
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Photographic film is a strip or sheet of transparent film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals. The sizes and other characteristics of the crystals determine the sensitivity, contrast, and resolution of the film. Film is typically segmented in frames, that give rise to separate photographs.
Undeveloped 35 mm film roll
A roll of 400 speed Kodak 35 mm film
A Polaroid instant photograph
135 Film Cartridge with DX barcode (top) and DX CAS code on the black and white grid below the barcode. The CAS code shows the ISO, number of exposures, exposure latitude (+3/−1 for print film).