Only that for weird historical reasons, the 1 / 2 inch sensors are much smaller than 1/2 inch. The inch number refers to the diameter of the vacuum tube having

Only that for weird historical reasons, the 1 / 2 inch sensors are much smaller than 1/2 inch. The inch number refers to the diameter of the vacuum tube having the same sensitive area... https://en.m.wikipedia.org/wiki/Image_sensor_format#Table_of_sensor_formats_and_sizes https://en.m.wikipedia.org/wiki/Image_sensor_format#Table_of...