Lizars Challenge Camera Model 1B Stereo. Around 1905. Format 3¼ x 6¾ Inc. Beautiful typically English manufacturing in mahogany varnished internally and covered in coarse grain leather externally. Tessar Carl Zeiss Jena 1 lenses: 4.5 / 12 cm, mounted on removable plate. Coupled iris diaphragms. The lens spacing is adjustable. Vertical decentering possible. Variable slit focal plate shutter for high speeds. Front board that can be raised for very short focus shooting. Rare piece in very good condition..