Slide Duplicator: an easy to use system for duplicating slides and making internegatives from slides. DIADUPLICATOR 24x36 35 mm - cod. 090 The three knobs control the dichroic filters and remove the dominants. It is also possible to make internegatives. DIADUPLICATOR 6x7 6x6 e 24x36 mm - cod. 091 With adapter for sizes 6x6 and 24x36; it is a more professional unit. The three knobs control the dichroic filters and remove the dominants. It is also possible to make internegatives.