Sony has unveiled a new stacked CMOS image sensor for use in smartphones. Called the IMX230, it features 21 effective megapixels, on-chip phase detection AF and 4K video recording. The chip is a 1/2.4-inch type with square pixels measuring 1.12um x 1.12um each. Video of up to 4K (4096 x 2160) resolution is available with HDR function (also available in stills mode). Read more
Articles: Digital Photography Review (dpreview.com)