Читать книгу Collins Complete Photography Manual - Collins Dictionaries - Страница 94

Telephoto zooms are more versatile than standard zoom lenses but have smaller maximum apertures. However, their flexibility and lower cost make them better-suited to general purpose photography.

Most ‘kit’ zooms (those supplied with the camera) have a maximum focal length of between 90 and 105mm, depending on the lens. This is not enough for sports and wildlife photography, and there may be other occasions in your photographic life when a longer lens is desirable or even essential.

Do bear in mind that the longer the focal length, the more difficult it will be to get steady shots. Small movements of the camera become magnified with long focal lengths and this causes two problems. Firstly, the subject will appear to bounce around the frame a lot more and it will be difficult to keep it centred. Secondly, camera-shake can cause blur at shutter speeds which would be ‘safe’ at normal focal lengths.