150. Repeating Holder with Colour Filters for Stereoscopic Camera, c. 1900


Mahogany sliding frame with three filters (red and blue side-by-side and green below), and a ground glass focusing screen. The Kromaz system patented in England in the late 1890s was a rival to Ives's Kromskop. The system of filters was arranged in such a way that in this case the stereoscopic colour-separation transparencies were laid on a viewer similar in appearance to the Kromskop viewer but with only a single step.

Length 275, width 175, depth 40 mm (frame only).
Inventory no. 24,340.