Sony RX10 mark IV is the ultimate 1-inch bridge camera, a luxury 24-600mm on a high performance 1 inch cmos sensor. The 24-600mm lens on RX10m4 is a truly monster which is as sharp as any trinity zoom lens for 1-inch, M4/3 and APSC at anywhere of the covered focal length. The last value of M4/3 family on telescope lens is totally destroyed by this camera. The weakness of RX10m4 is the poor dynamic range due to small sensor (still as good as any M4/3 sensor), also the sunstar is pretty ugly, cannot converge even for f22.