The FED 50 is a 35mm miniature rangefinder camera with automatic and manual modes. It features a viewfinder with parallax correction marks and displays shutter speed and diaphragm information in automatic mode. The camera has a self-resetting picture counter, and safety interlocks for the release button in low light and for shutter cocking to prevent accidental or incomplete cocking. The automatic system is powered by a long-lasting photocell, requiring no replaceable power sources. Thoroughly reading the instructions ensures reliable operation.