I am indebted to the book "The Home Cinema, Classic Home Movie Projectors 1922-1940" by Gerald McKee published in 1989 for the following information.
"The Campro took standard Pathe chargers. Its lens was primitive, with three-aperture Waterhouse stops: it was used fully open for projection. "Dull" or "Bright" was the only indication when shooting film. The lamp was a Lumax 6 volt with white paint on its rear to act as a reflector. For projection the top of the camera opened to take a standard 9.5mm cassette. It had a clockwork motor for both taking and projection, a footage counter and a tripod bush. A socket at the back of the case was where the battery plugged in for the lamp." It therefore seems that a further lens was not required for projection.
_________________ Maurice
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