Apple’s first foldable iPhone does something more consequential for photographers than simply bending. With a 7.6-inch inner display, Apple Pencil support and a camera built into the same device, iPhone Duo begins to occupy territory previously reserved for the iPad. The question is not whether it can replace Apple’s tablet, but how much iPad a photographer still needs away from the studio. For most of mobile photography’s history, the workflow has involved a quiet compromise. The iPhone is the camera that is always with us, but the larger screen is the place where serious looking begins. We capture on one device, transfer or synchronise to another, then edit, sequence, annotate…