Nikon D5100 Experience34no reason to use it. It is something you may wish to return to later if you run into a difficultexposure and focus situation and discover the need to sometimes work this way.Live View and Movie FocusingLive View Focus ModesWhen working in Live View, you can choose from the following Focus Modes:Single-servo AF (AF-S) – As described above, press the Shutter-Release Button half-way tofocus on a subject. Focus distance will not change unless the Shutter-Release Button is pressedagain. This is best for still subjects.Full-time-servo AF (AF-F) – The camera will automatically and continuously focus on what itbelieves to be the main subject. This can be used for moving subjects.Manual focus (MF) – This is the recommended focusing method for movie recording. Itprovides the most control, and is generally used by advanced videographers. However, optionaland expensive viewing devices and follow-focus devices are needed for best results.Live View AF-Area ModesFace-priority is obviously good for tracking and focusing on faces, however it can lose thesubject if their face turns sideways or is obscured.Subject-Tracking is good for following moving subjects. Tell the camera what to track byplacing the focus point over the subject and pressing the OK Button. Use this in conjunctionwith Full-time-servo AF (AF-F) to automatically retain focus on a moving subject.Set Wide-area or Normal-area in other situations, based on how precise you wish to be and howlarge of an area you wish the camera to look at to determine focus.You will see that focusing in Live View is typically slower and more cumbersome than theimmediate response of the viewfinder AF system, so it is generally preferable to work throughthe viewfinder.Release ModesThis controls the number of shots taken when you press and hold down the Shutter-ReleaseButton, or else sets the camera for the Self-Timer, Remote, or Quiet shutter release options. Itcan also be considered the “drive mode” if you are used to that terminology. This is set with thei Button and Information Display (see Figure 23).Single frame will take just one shot even if you keep holding it down. Use this, obviously, whenyou only wish to take single shots and when you are using the internal or an external flash,because the flash typically needs a brief time to recharge between shots.Continuous will keep taking photos as you hold down the Shutter-Release Button,approximately 4 frames per second (fps). Use this for action situations when you want to capturea series of shots, the exact right moment or the peak of action, when a subject’s expression maybe changing from moment to moment, or when capturing subjects or animals in motion. Notethat if you are working with slow shutter speeds or using a flash, or if your memory buffer is