For the second year in a row, Samsung has bet on a 108 MP sensor, fixing the "so-so" results of the S20 Ultra. Now the sensor is equipped with a very sophisticated and practically infallible AF, the dimensions of the sensor (Isocell HM3) are however always the same, not so large compared to the resolution. It is a precise choice by Samsung which prefers to make very high definition available to the user, with the possibility of shooting at 108 MP, with the software that actually works automatically considering the pixels in groups of 3x3, for photos resulting in 12 MP .
One of the novelties of 2021 was the introduction of an ultrawide camera with AF and a 12 MP Sony IMX563 sensor. Confirmation also for the 40 MP front with AF, the only one of all the protagonists of the comparison equipped with this characteristic.
A further uniqueness of the S21 Ultra is the presence of a double telephoto lens with different magnifications for portrait photos and photos of distant subjects.