Digitizing stereo photographs can bring back to museums and archives some of the challenges that early photographers had to deal with. When digitizing the original negative plates in wet collodion or in gelatin silver, the protocol followed for stereos is apparently the same as for mono photography. As a result, archives are presenting to their public and researchers files with untransposed left and right images of each stereo pair. In other words, wrong or 'pseudo views' are being uploaded daily in institutional websites and databases, adding an extra layer of difficulty for the presentation and viewing of some historical gems of western visual culture. This problem was first noticed during a research project dedicated to Portuguese stereo photography which has catalogued thirty one collections of stereo photography, consisting of mainly negatives.