The definitive guide to filter use, beginning with,a primer on the electromagnetic spectrum and light,absorption, this guide covers all you need to know,about filters, including the materials from which,they are made, how specific filters work, how to,compensate for a change in available light with an,exposure adjustment and what result your choice of,filter will have on your images. Including a,chapter devoted to special effects filters, this,book offers you the tools to take control of your,photography. Includes 100 full-colour photos.