Sony has designed the Xperia 1 II to be the smartphone equivalent of its Alpha cameras. Indeed, the phone borrows many features and hardware solutions from the company's digital camera division. Sony is sticking with 12MP resolution this year, but the large 1/1.7" main sensor has 1.8µm pixels and boasts 50% higher sensitivity than the 12MP sensor on the Xperia 1. This will improve low-light performance, says Sony and offers these down-scaled camera samples comparing the Xperia 1 II to its predecessor. Low-light samples: Xperia 1 II and Xperia 1 Data from the whole...
Source: https://www.gsmarena.com/sony_goes_into_great_detail_on_the_xperia_1_ii_camera_and_its_alphainspired_features-news-42937.php
