Guides 11791 Published by

TrustedReviews have a photography tutorial titled How It Works - Zoom Lenses.



There are many different designs for zoom lenses, but they all have some basic principals in common. They consist of a number of differently shaped individual lenses or ‘elements’, some of which move relative to one another to alter the magnification of the image without altering the focus.
How It Works - Zoom Lenses