Will tell from the principle, in far focus and nearly all have a focus and allow diffuse circle, this range between call of the depth of field, that is the focus of before and after, the images are still have a clear of the range, and was taken before and after the body of the deep, control the photographic image of the canon nb-5l battery element in the fuzzy degrees. Aperture, the camera and film the distance of the things is the important factor of influence of the depth of field. The greater the aperture of the depth of field is smaller, the smaller the aperture of the depth of field. The longer the focal length of the lens of the depth of field, and the smaller the greater the depth of field. Subject more close, and the smaller the depth of field, the main body of a more far, the greater the depth of field. In order to highlight was made things, many people may choose to small depth of field. Of course, if you want to take the landscape, we will suggest choose a big depth of field.

Influence factors of depth to the two first is a lens, the second is the picture. First is in the economic conditions allow buy as far as possible big CCD photographic components/CMOS digital camera.

Depth of field and aperture, the focal length, the photography distance these three factors, control of the depth of field is through the control of the three factors to achieve the wish the depth of field.

Choose "appropriate" aperture. Aperture size is the effect of the basic elements of the depth of field. To sum up, small aperture (by larger f/numerical said), such as f / 16 or f / 22, have wide clear focus range. Instead, large diameter aperture (smaller by the f/numerical said), such as f / 2.8 or f / 4, produce limited depth of field, the foreground and background of acceptable clear range are much smaller.

The choice is long or short the focal length. Anyone who USES 28 mm and 300 mm wide-angle focal length lens will find photos usually have extensive range of the depth of field. Instead, those who use a long-focal-length photographs in general are very shallow depth of field. This usually lead to a simple canon bp-915 battery conclusion: in any known on the aperture of the block, the longer the focal length, the shorter the depth of field. If you need a larger picture of the depth of field, use the shorter the focal length to pat.

Change the camera and be taken body distance. Depth of field is to be taken by the camera body the influence of distance. When you are very close to the lens of the things focus, have been of the depth of field is very small. When you focus on the far, depth of field will be bigger, but also because of the focal length and depth to the different change.

Determine the "right" focus. As a common sense, of the canon nb-1lh battery depth of field in the distance is usually taken by following the distribution of the way: the focus of the depth of field to extend ahead about one-third, to focus the rear extensions about two-thirds. You want to get great depth of field? Then put the focus in the big scene roughly 1/3 place.