Apparatus for the photographic reproduction of transparent documents

Apparatus for the photographic reproduction of transparent documents in black and white or in color, of the type comprising a principal light source, colored or uncolored, a condenser, interchangeable objectives, object and image planes movable with respect to one another and an auxiliary light exposure source, wherein said condenser is constituted by two thin stepped lenses, the source being in the object focal plane of the first of said lenses and the pupil of the objective being in the image focal plane of the second lens, a corrector screen arranged between said two lenses for the variations in illumination in the image plane due to the inclination of the useful beam to the axis of the system, this screen being fixed so that its surface is perpendicular to the parallel ray beam, the constituent elements of the source, of the condenser and of the pupil of the objective used being fixed with respect to one another and movable in a single unit relative to the document to be reproduced according to the focal length of said objective determining the size of the document.