Depth of Field Explained

Many new DSLR Camera owners have a hard time understanding Depth of Field. The Depth of field (DOF) is the distance in front and beyond the subject that is in focus. The DOF can be very precise and only have the subject in focus or be very large and have the subject and the background in focus. This is determined by the subject distance, the lens focal length and the f-stop. Along with adjusting these three parameters, you also have to understand that changing the f-stop (aperture) you will also have to adjust the shutter speed depending on the amount of light you allow in with the aperture.

Please watch this short video which should help explain how to operate a lens to change the depth of field when framing up a subject.