Originally posted by Wikipedia+DPR: The sensor sizes of many compact digital cameras are expressed in terms of the non-standardized "inch" system, as approximately 1.5 times the length of the diagonal of the sensor. This goes back to the way image sizes of early video cameras were expressed in terms of the outside diameter of the glass envelope of the video camera tube.[
It is incredible how vendors get away with giving confusing information about a core feature of their products. One would assume that consumer protection organisations would have stopped this nonsense long ago ...
So, why not advertizing a 42" HTDV as 63" ?