An experiment I did using a movable matte over the lens of my canon 814. I shot through one triangle of one space in the matte, filmed the whole roll, opened up the catridge, rewound the film and then filmed the whole roll again but this time moving the triangle into the next quadrant. In all there are four expositions. The colorful burns around the side are due to a light leak (it must have happened while I was reversing the film). The film is Agfa 50d reversable.