FIELD IN FO
When you take a photograph, the objects lying within the focal length of the lens is sharper in contrast to those either further away from the lens or closer to the camera. The range between the sharpest nearest and farthest points is called “depth of field”. You can creatively use depth of field in photography. Knowledge of depth of field can make your pictures interesting. For instance, by putting your subject in sharp focus, while simultaneously ensuring the background is out of focus, you will create a picture whose subject is not cluttered by the background.
Focus plays a significant part in how good a picture is. By using depth of field, you can play around with the areas in a photograph that you want to draw attention to. With creative use of defocus, you can add an aura of mystery to a picture (much like in a soft-focus photograph) or capture a glorious landscape without parts of it being blurry.
The magic of how to control depth of field lies in your ability to use the aperture of the camera. The simple rule is that opening up the aperture decreases the depth of field, making it smaller produces the opposite effect. A smaller aperture, say f11, will give you sharpness over a greater area