https://www.cnbc.com/2018/02/26/sony-unveils-xperia-xz2-with-worlds-first-4k-hdr-video-recording.html >Sony took the wraps of its latest smartphone Monday, which it claims is the world's first to offer so-called 4K high dynamic range (HDR) video recording. >The Japanese tech giant hopes its bolstered camera will help it battle smartphone giants Samsung and Apple.