Autofocus is that great time saver that is found in one form or another on most cameras today. In most cases, it helps improve the quality of the pictures we take.

In this edition of HowStuffWorks, you will learn about the two most common forms of autofocus, and find out how to determine which type of autofocus your camera uses. You will also learn some valuable tips about preventing the main causes of blurred pictures when using an autofocus camera.