
Depth of field has always been a preoccupation for photographers. Or it used to be. These days we seem to be fixed on the shallowest depth of field possible in pursuit of that great god of bokeh, but it hasn’t always been that way. In the past, photographers were more concerned about how to keep things in the whole frame sharp, from right up close to far away.
Today's best lenses for bokeh are great for blurry backgrounds but often no help at all if you're trying to estimate depth of field.