Samsung has made much ado of the Galaxy S20 Ultra's enormous camera array, but just what's in there that requires a conspicuous hump on the back of the phone? You don't have to wonder. iFixit has a teardown of the range-topping beast, and it's clear Samsung really didn't have much choice. The 108-megapixel primary camera by itself is huge -- the sensor covers twice the surface area of the 12-megapixel unit in the iPhone 11 series. The periscope-like zoom camera, meanwhile, needs a lot of space for its unusual lateral design, including optical image stabilization just for the prism.