I think you could butt two sensors together, only there would have to be a visible join line between them. You could even put three small sensors together, with each one oriented vertically. If each one had a 4:3 proportion, then the composite sensor would be 9:4. Arranged horizontally, the whole picture would be 12:3, for a 4:1 aspect ratio. The question is, though, would enough people want one if there has to be thin blank spaces between adjacent panels? If would look like three-lens Cinerama!