The variable aperture lens of the shiny new iPhone 18 Pro goes almost one stop wider than the fixed aperture lens in its predecessor: up from f/1.78 in the iPhone 17 Pro to f/1.48 (a smaller number is wider).In principle, this will allow for slightly shallower depth of field, enabling greater separation between your subject and the background – although it’s a relatively small difference. But there are four ways to achieve shallow depth of field (DOF) with much older iPhones … more…