Three simple ways to ensure spot-on focus
Choose your focus mode
Think about your subject and set the focusing mode to suit. If the subject is constantly moving, even by a small amount, select continuous focusing (AI Focus). When working with limited depths of field, critical focus is absolutely crucial to image success.
Select your focus point
Think about your subject matter and then select the most appropriate focal point. Is the subject in the centre of the frame or off to one side? An inaccurately positioned focal point will ruin the shot, so think about this before raising the camera to your eye.
Don’t forget Live View
For static subjects, Live View is by far the best way to ensure focus lock. Set your lens to Manual Focus (MF), focus and then refocus, ensuring the screen really snaps into critical sharpness before tightening down the tripod for extra stability.