Understanding Depth Of Field - DOF Tutorials

What is 'Depth of Field' (DOF)? - Definition
There are many beginner photographers and even more experienced ones that still don't quite understand what the meaning of the term 'depth of field' or DOF. I want to provide you a reference from some of the most professional articles ever written on depth of field. In general, the zone of acceptable sharpness is referred to as the depth of field.