The triple-lens camera on the back of the iPhone 13 Pro and Pro Max is impressive (we even love the lenses on the regular iPhone 13). But the real star of Apple’s superb camera system is the work that goes on digitally every time you hit the shutter. When you snap a photo on an iPhone, you’re probably capturing closer to nine frames thanks to Deep Fusion.
Sometimes casually called “sweater mode” because of how Apple chose to introduce the technology back in 2019, Deep Fusion uses computational photography to merge a handful of frames into one, hopefully perfect, image.
