Photos can pop when one area is in sharp focus and the other blurry, providing the impression of depth in a two-dimensional image that matches how our eyes focus on objects, even though we don’t typically perceive this. This technique once required a lens of the sort found on an SLR or DSLR (analogue or digital single-lens reflex) or mirrorless camera. You adjust the f-stop, traditionally noted with an ƒ, which changes the depth of field or the range from the camera lens to a further point that can be in focus.
Apple’s switch to an array of two
