One of the advantages of using zoom lenses is their ability that enables photographers to compose and crop the desired images directly and quickly within the viewfinder prior to releasing the shutter button by zooming back and forth for the preferred settings. For example, the 24mm end may be too wide for a particular picture and the 85mm side might be too tight to fit in all the necessary surroundings. After zooming back and forth, you may find that the ideal focal length will be at between the 35mm and 70mm settings and so you set your zooming ring at that setting and click. All these can be done in mere seconds and much faster than switching lenses or moving your position back and forth if you are using fixed focal length lenses rather than zooms. This is especially important if the subject is moving since changing lenses might mean that the subject may have already disappeared from your view by the time you have complete the changing of lenses. Telephoto focal lengths are also known to be effective for shooting abstract pictures. With zoom lenses having telephoto at the top end, abstract photography is made even easier since it enables the photographer to zoom up instantly to the appropriate angle to record the abstract look on film. << Back to Main . 1 . 2 . 3 . 4 . 5 . 6 . 7 .