Abstract: Apparatus for processing film and prints includes a box which holds processing equipment. A removable cover is mounted over the box to form a light-tight processing chamber. The chamber has at least one armhole equipped with a light-tight sleeve. An inner light-tight door can be moved to open the hole when an operator's arm extends through the hole, and moved to close the hole when the arm is removed so that when film or paper is being processed within the chamber, the operator's arm can be withdrawn from the hole without danger of fogging the film or paper.