Why should you learn how to use manual focus (MF or M), especially with all the amazing advances in autofocus (AF or A) technology? Well, there’ll be times when all the AF points in the world won’t help you get sharp shots. Often, activating MF is the only way of beating the dreaded blur.
Macro photographers often use manual focus to dictate their focus point. So do low-light shooters and photographers working in tricky situations, such as shooting through glass, or perhaps focusing on a distant horizon on a misty morning, when autofocus may struggle to get a lock. Sports photographers benefit from pre-focusing in manual focus, especially if they can predict exactly where the action is going to take place.