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| This picture was taken with a focal length of 18mm, which shows a lot of objects and the view is wide. |
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| This picture was with a focal length of 28mm and the view has diminished and some of the objects have disappeared |
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| Here since the focal length is 80 mm the swan the main object is clear and prominent and all the other objects have disappeared.So if one has to concentrate on a particular object one has to use the largest focal length, this is useful in taking portrait photographs. |
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