https://www.theverge.com/2017/9/8/16270064/how-to-samsung-galaxy-note-8-camera-live-focus

Samsung’s Galaxy Note 8 is a giant phone with a ton of features, but one of its most prominent ones is its new dual-camera setup. This system, which includes two 12-megapixel cameras with different focal length lenses, lets you take either wide-angle or zoomed-in pictures.

TheNote 8’s camera also lets you mimic the blurred background that you can get with a larger, DSLR camera. This can be cool for portraits, close-ups, or anything else where you want your subject to stand out from the background as much as possible.