How does the Distance from the Camera to the Subject affect the Depth of Field?

How does the distance from the camera to the subject affect the Depth of Field?

 

We performed a study to determine how the distance from the camera to the subject affects the Depth of Field (DOF). As in all of our studies or experiments all of the parameters except for one are constant throughout the experiment.  The only parameter that will change in this study will be the distance from the camera to the subject. These are the parameters and a description of the study:

How do Depth of Field and Circle of Confusion relate to each other?

Technical Level: Intermediate-Advanced  
techspec_intermediate-advanced

How do Depth of Field and Circle of Confusion relate to each other?

This is an advanced subject. You should have completed lessons DP-111C and DP-112C before trying to apply the information contained in this blog post.

The size of the camera sensor, the focal length of the lens, aperture size or f stop and the distance from the camera to the focus point all have an impact on the available Depth of Field (DOF).  All of these issues work together to either create a broad flat DOF curve or a steep DOF curve.