Emil Wünsche Simplex

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Simplex daylight enlarger Scan by Uwe Kulick (Image rights)

The Simplex is an enlarger, using daylight (or any ambient light source). It comprises a retancguler light-proof chamber, with a frame to hold a plate at the top, and a lens mounted inside, part-way down so as to give correct focus on a sheet of printing paper placed at the bottom. Exposure is controlled with the lid on the top. It is an entry-level step beyond contact printing: it gives one degree of enlargement, and little ability to crop the image. With printing paper of any significant sensitivity it would be necessary to load the paper under safelight.