Optical image stabilization has been around in the larger iPhone models since their introduction, so with that ace removed from its sleeve, the 7 Plus is getting a new feature to differentiate itself: a dual-camera system. The new cameras, both at 12-megapixels operate together in ways we've seen before from other manufacturers. They're set at different focal lengths -- one wide, the other telephoto -- which allows you to "optically zoom" to 2x by switching cameras. You do this by tapping on a button above the on-screen shutter key, and you can also swipe across to digital zoom up to 10x. We saw a similar trick used to great effect with the LG G5, and with Apple's penchant for high quality optics and sensors, it's likely to be even better here.