That's good as long as they quote the sensor size in millimetres for the width and height (e.g. 36 mm × 24 mm "full frame"). What is atrocious is the inch form

That's good as long as they quote the sensor size in millimetres for the width and height (e.g. 36 mm × 24 mm "full frame"). What is atrocious is the inch format - e.g. 1 inch sensor, 1/2.2" (decimal and fraction!). It somehow refers to the diagonal length of the vacuum tube and not even the active image area. https://en.wikipedia.org/wiki/Image_sensor_format#Table_of_sensor_formats_and_sizes https://en.wikipedia.org/wiki/Image_sensor_format#Table_of_s... , https://en.wikipedia.org/wiki/Video_camera_tube#Size https://en.wikipedia.org/wiki/Video_camera_tube#Size