It's a dual - lense set - up that allows you to do things such as
measure the distance between
objects in a
photo, refocus a picture after shooting it and apply filters to different layers of your images.
There's a 4 - Ultrapixel shooter that delivers good low - light
photos and decent (though small by other current smartphone standards)
photos in other settings, and a second infrared sensor that
measures depth, giving you the ability to selectively focus or blur
objects in a
photo after it's taken.