Advanced Developments in Studio Television Cameras
Donald A. Pay, Thomas F. Mayer · Journal of the SMPTE · 1965
The Marconi Mark IV 4½-in. image-orthicon camera was introduced to the SMPTE in 1959. Further development of the 4½-in. image-orthicon camera includes the use of semiconductors, a single (zoom) lens and automatic timing. Some consideration is given to the design and development of a new color camera.