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Can anyone explain to me in simple terms and as it relates to digital photography what the "depth of field" is |
Can anyone explain to me in simple terms and as it relates to digital photography what the "depth of field" is Depth of field (DOF) is a term which refers to the areas of the photograph both in front and behind the main focus point which remain "sharp" (in focus). Depth of field is affected by the aperture, subject distance, focal length, and film or sensor format. A larger aperture (smaller f-number, e.g. f/2) has a shallow depth of field. Anything behind or in front of the main focus point will appear blurred. A smaller aperture (larger f-number, e.g. f/11) has a greater depth of field. Objects within a certain range behind or in front of the main focus point will also appear sharp. Coming closer to the subject (reducing subject distance) will reduce depth of field, while moving away from the subject will increase depth of field. Lenses with shorter focal lengths produce images with larger DOF. For instance, a 28mm lens at f/5.6 produces images with a greater depth of field than a 70mm lens at the same aperture. It relates to how much of the picture is in focus. "Gourmet" magazine does many food shoots with shallow DOF. Ansel Adams used more/deeper(?) DOP. As it relates to ANY form of photography, it is the range of what is in focus. Are people close to the camera in focus as well as those far away, or are just either the close ones or the far ones in focus? when you take a picture of say a crowd.. the people in the foreground will be in focus, but the people in the background might be blurry because the camera is not focussed on them.. the people in the background have a different distance from the lens, or a different depth of field. It refers to the amount of the photo that is in focus. Pictures with a shallow depth of field may only have may only have a small portion of the photo in focus, such as an extreme close up of an insect, where only the eye is in focus. Pics with an extreme depth of field have everything from foreground to distance in focus. Generally speaking, a shallow depth of field is accomplished with a large aperture (small number such as f2.8) while a landscape with an extreme depth of field may have been shot at f 22 or f 32 (tiny aperture). I hope this answers your question! I'm a professional photographer In simple terms, Depth of Field is the distance range from the camera in which the subject will be in focus. For example, it might be in focus between 10 feet and 14 feet, or between 1 mile and 5 miles. Depth of Field varies with the Aperture setting, the Telephoto setting, and the distance from the camera. With further study, you can use it to create backgrounds that are either clear in-focus or blurred out-of-focus. Good Luck |
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