Focus and Depth of Field
As we continue our work with the basics of photography it's time to have a look at focusing and the active use of Depth of Field and focus. We will cover the basics in this article and in later articles we will touch more upon subjects such as bokeh and the use of depth of field and focus in other forms of specialized photography.
Before going in to the main subject I feel it important to point out the connection between focus, distance to subject, focal length and aperture.
Here are some general rules for focus, and DoF:
-Focus in on the main subject.
-The closer to the camera the shorter the DoF. (If you stand close to the subject sucha as with macro the smaller DoF you'll get. If you stand farther away you'll get more of the photo in focus.)
-The larger the aperture, the shorter the DoF. (Low f/stop numbers = large aperture high numbers = small aperture.) f/1.8 gives a smaller area in focus than f/8 but f/1.8 allows for faster shutter speeds.