6 Accessorize!
6.1 Filters
Filters are simple optical devices—typically flat discs of glass—that fasten onto a lens and alter its performance in some way. Most filters don’t magnify or otherwise change the focal length of the lens. They just perform basic functions, such as absorbing certain colors, and thus altering the overall color balance of the photo.
A six-point star filter was used for this portrait. The filter transformed the light from the modified flash unit strapped to the model’s hand into a starburst.
Threaded filters
Most Asian-made ...
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