To get great depth of field in your scenic pictures, use a wide-angle lens and a small lens opening.
Depth of field is the distance range within which objects in a picture look sharp.
As you gain a sound understanding of depth of field, you can use it as a very effective control for making better pictures. Depth of field varies with the size of the lens opening, the distance of the subject focused upon, and the focal length of the lens. Depth of field becomes greater as the size of the lens opening decreases, the subject distance increases. Three factors affecting depth of field. An object at the distance focused upon will be the sharpest thing in the picture.