Getting Focus
There are important things to remember when it comes to focusing.
1. The closer you are to your subject, it is important to make sure your focus is accurate.
2. If you are shooting a moving object that is moving to you or away from you, pre-select a mark at which you will wait until the subject comes to you.
Remember to keep the subject in view than press the shutter when the subject has hit your mark.
3. To bring the distance into focus, set your distance-scale to infinity. To bring both the foreground and the distance into focus, you will want to increase your depth of field.
I personally like to set my focus on manual only because auto-focus has limitations. It all depends on the scene, subject and whether I am using my aperture or shutter as a primary.