<sod>used on a given image format give approximately the same DOF.  This is a common source of misunderstanding amongst photographers who believe mistakenly that focal length materially affects DOF. It is important to note that this is true ''only'' when the subject distance is small in comparison with the hyperfocal distance; however, this is often the case in many photography scenarios. <eod>
<sod>used on a given image format give approximately the same DOF.<eod>