Until recently I had thought that the Super Emitron was a totally virtuous development of the Emitron but..
"Whilst the Super Emitron gave advantages in terms of tilt and bend and a significant improvement in sensitivity, in a paper presented to the IEE in late 1938 McGee and Lubszynski described how this type of camera was chiefly used for outdoor transmissions because a distortion of the image tended to be more obvious in studio scenes where straight lines and rectangular objects were more prevalent.
The Super Emitron was first used by the BBC in November 1937 for televising the armistice ceremony at the Cenotaph. The distortion is far from obvious in the screen image."
Peter
