The Etude Stereo projector was manufactured by FED especially for the FED-Stereo camera. It has twin T-3 f/2.8 80 mm lenses and twin KGM 220-230-200 lamps. Equivalent lamps are the A1/248 240 V, 150 W type. The projector has a built-in carrying handle, which unfolds from below the lenses (picture 3).
The projector is provided with two slide carriers (photo 4). The upper one is for stereo slides and the lower one for single standard 2 x 2 slides.
Photo 5 shows the set of stereo viewing glasses, which use polarising filters.
The final pic ture shows a set of stereo slides (5 x 10 cm).
The knob on the side of the projector is for vertical alignment of the images, and the front knob on the top is for horizontal alignment. The back knob on the top is for focusing. There are two separate switches (red)on the top for switching on the lamps. The main on/off switch is on the back of the projector.

David Tomlinson.