The Sony Cyber-shot DSC-RX100 IV is a digital premium compact camera announced by Sony on June 10, 2015 as the fourth entry in the Sony Cyber-shot DSC-RX100 series.
[1] It is one of a pair of cameras launched together by Sony that use their new stacked CMOS sensor.
The other camera is the Sony Cyber-shot DSC-RX10 II, a model providing a larger lens and greater zoom, but less compact body.
Compared to its predecessors, the RX100 IV also has a faster electronic shutter and increased read-out speed for video, which will also result in a reduction in rolling shutter effect and allow high speed video to be captured.
[2] The camera was succeeded by the RX100 V, which improved upon some of the issues such as buffer and heating that the RX100 IV suffered from particularly in recording video.