Minimum Depth of Field

How to achieve this:

• The aperture has to be on the lowest number, which depends on the camera. Most of the time, this is F3.1
• The focal length must be on the highest number, which is 300mm on most cameras but again, it depends on what camera is being used.
• Once the settings has been adjusted, the photographer should stand fairly close to the subject but far enough to capture some of the background in the image.