ABSTRACT
Anything under a 60th of a second can produce blurring if the patient or photography moves even slightly.
Depth of Field Depth of field refers to the distance between the closest and farthest in-focus area of a photograph (also called the focal range). Depth of field is affected by the aperture, subject distance, focal length, and film or sensor format. The smaller the aperture, the greater the depth of field meaning that objects within a certain range behind or in front of the main focus point will appear sharp ( 3 ).
