Samsung is using two different sensors for the rear-facing as well as the front-facing camera in the new Galaxy S8 and Galaxy S8+ smartphones.
Some units of both the Galaxy S8 and Galaxy S8+ feature Samsung’s S5K2L2 ISOCELL sensor while others use the new IMX333 sensor sourced from Sony. Both of them are 1/2.55” type sensors, very slightly bigger than the 1/2.6-inch sensors used in the Galaxy S7 and Galaxy S7 Edge. Samsung has been using two different camera sensors in its flagship Galaxy handsets for quite some time now, so the info shouldn’t come as a surprise to anyone.
The selfie snapper on some units features the IMX320 sensor from Sony, while others use the S5K3H1 sensor developed by Samsung’s System LSI division. As you may know already, the Galaxy S8 and Galaxy S8+ front-facing camera integrates autofocus mechanism, making them the first Samsung smartphones to feature an AF camera on the front.
As we have seen with previous Samsung Galaxy flagships, the company makes sure the two sensors deliver similar image quality. So if you’re thinking of buying a new Galaxy S8 or Galaxy S8+, you shouldn’t worry about what sensor your particular unit will have. Still, if you’re curious, you can check which sensor your Galaxy S8 or Galaxy S8+ comes with by installing the AIDA64 system info app from the Google Play Store.