Abstract: An improved light trap for use in conjunction with photographic equipment consisting of a frame and an exposure-controlling slide slideably mounted between two longitudinal edges of the frame, the light trap comprising in combination a first flat spring member disposed in a recess in the frame arranged both to bias the slide against a portion of the frame and, upon removal of the slide, to contact an opposite portion of the frame; and a second flat spring member disposed in a recess in the frame on the opposite side of the slide from the first spring member also arranged both to bias the slide against a portion of the frame and, upon removal of the slide, to contact an opposite portion of the frame. Additionally compressible strips may be positioned along those portions of the frame contacted by the springs to further seal the frame against light intrusion.