John Logie Bairds intermediate film camera, c 1936.

UNITED KINGDOM - NOVEMBER 23: A Vinten Model H 35mm film camera, believed to have been used in John Logie Baird's television studio. In 1936 Baird used a system called the 'Intermediate Film Technique'. A modified film camera was used to shoot scenes in the studio. The film was fed through a hole in the bottom of the camera into tanks containing developer, fixer and then water. Whilst still underwater the developed film was then scanned by a special Nipkow disc to convert it into a television picure. The system was very unreliable and was dropped after 3 months. (Photo by SSPL/Getty Images)