Abstract: An improved light box and film matrix with magnified viewing means for editing photographic images that have been scanned into a computer for photo manipulation. The light box contains light-blocking shades on top, left and right sides, and may be attached to the side of a computer monitor or placed on a horizontal surface. The film matrix confines photographic film while blocking extraneous light coming from within or behind the light box translucent viewing surface, and may be rotated 900 to accommodate horizontal or vertical images. The matrix holds mounted 35 mm and 6.times.6 cm slides, and single frames or sheets of 35 mm, 6.times.6 cm, 6.times.7 cm, and 9.8.times.12.4 cm film. A unique mounting bracket allows the light box to be placed vertically, immediately adjacent to the computer screen while comparing images, eliminating eye and back strain associated with conventional horizontally placed light boxes.