The Sony FDR-AX1 camcorder is said to have professional quality with 4K capabilities at a prosumer price point ($4,500). The Sony NEX VG-900 and Sony NEX VG-30 are also highly rated Sony camcorders that cap out at 1080P with interchangeable lenses. I am trying to decided between these camcorders but I am really confused about the sensor sizes between them. i know the VG-900 has a full frame sensor, the VG-30 has ~2/3 of a full frame sensor, and the FDR-AX1 has a 1/2.3" cmos sensor (~1/6 the size of a full frame). From what I am reading the AX1 has some of the best video quality on the prosumer market but I am confused as to how that is possible with a sensor so much smaller than its competitors. Could someone explain this to me? Please use plenty of detail, I can generally pick up on technical information pretty easily.