The half-true because it only refers to the shallow depth-of-field. Sometimes also confused with the bokeh, which is basically the quality of out-of-focus parts of an image.Go to the other extreme and get flowers, cabins and mountains (and people too) sharp focus in a landscape photograph requires a depth of field. That means the foreground and background are sharp as well.
Depth-of-field is sharply focused area, which is controlled by 3 factors:
* Aperture (hole bigger like f2.8 gives you less DOF, a small hole like the F16 gives you more)
* Focal length (tele lens less DOF, while the wide-angle lenses have more)
* The distance between the subject and the camera (the closer you are, the less you will have DOF)
The most common factor of depth-of-the aperture setting. Shutter speed is usually taught in basic photography class as a major factor affecting how much depth of field in your photos.
A large aperture (which means the number of F minor, such as f1.4 or F2.8) will give shallow depth of field, while a small aperture (which means a large F number, such as F11 or F16) will provide a deep DOF.
This works well on SLR and DSLR cameras, but on point-and-shoot compact digital cameras, the difference is difficult to trace. This is because the point-and-shoot compact digital cameras are built different and inherently comes with depth in the field, even at F2.8 aperture settings that are common in the camera point-and-shoot. That means it's pretty hard to get a shallow DOF effect on the camera point-and-shoot, unless he has a long zoom range (such as 10x), which brings us to the next factor in controlling the depth of field.
focal length lens you are the next factor. long lens (telephoto lens) such as 200mm lens will give you shallow depth of field, while the wide angle lens like a 10mm lens will give more depth of field.
The third factor is the distance to the subject. Did you know that if you move closer to your subject, depth of field you will also experience a decline, namely. shallow depth of field? This works well if you use a point-and-shoot, and is trying to get "out-of-focus-background" look.
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