As per the latest report from the below source suggests, Samsung Galaxy S9 Plus’s major camera will use the f/1.4 1/2.55″ IMX345 sensor.
@MMDDJ_ via a tweet on Twitter – link provided below – claims this. The company has used the same size on its Galaxy S8 and Note8 smartphones as well. But according to latest reports from the Samsung.com the new sensor will support much faster readout – fast enough for 480fps video.
There isn’t any official information about this new sensor from neither Sony nor Samsung. So take this news as a grain of salt.