Читать книгу Collins Complete Photography Manual - Collins Dictionaries - Страница 90

Wide-angle lenses have a profound effect on perspective. This is not because of their inherent optical properties – the explanation is, in fact, much simpler. Wide-angle lenses make objects appear smaller, with the result that you move closer to fill the frame. The fact of doing this exaggerates the difference in size between nearby objects and those further away. In turn, this produces the ‘keystoning’ effect which is often seen when tall buildings have been photographed from their base. However, this exaggeration of perspective can have creative uses, as well. The dramatic size differences between close and distant objects produce a strong feeling of three-dimensional depth and compositional ‘movement’ in images taken in this way.

In common with most specialist equipment, wide-angle lenses have both advantages and disadvantages. Their most obvious advantage is that they enable you to get more into your picture. They also offer more depth-of-field than lenses of longer focal lengths at a given aperture, so that it is easier to get both close-up and distant subjects sharp at the same time.