Modern Lenses are Missing the Best Thing: a Depth of Field Scale

The functional depth of field scale is something that is sorely missing from modern lenses. Lens manufacturers and camera brands have proven several things over the years: and chief amongst them is the fact that pretty much anything is possible. Several years ago, they said that full-frame Mirrorless cameras wouldn't be possible -- but Leica proved them wrong. Shortly after that, they stated that phase detection wasn't possible on the sensor, but that changed too. Sony, a major innovator, at one...