NoteThe [Lock-on AF] function may not operate well in the following situations:The subject is moving too quickly.The subject is too small, or too large.The contrast between the subject and the background is poor.It is dark.The ambient light changes.HintIf you lose track of the subject, this product can detect the subject and resume the Lock-onAF function when the subject reappears on the screen.How to Use Using shooting functions Adjusting the focusPre-AF (still image)The product automatically adjusts focus before you press the shutter button halfway down.1. MENU → (Custom Settings) → [ Pre-AF] → desired setting.Menu item detailsOn (default setting):Adjusts focus before you press the shutter button halfway down.Off:Does not adjust focus before you press the shutter button halfway down.Note[ Pre-AF] is available only when an E-mount lens is mounted.