Tuesday, February 14, 2012
Do More With Your Polarizer
It’s the ultimate outdoor photography landscape filter, and we’ll show you how to do more than just darken skies
5 Is this a good scene for a polarizer? When you approach a scene, ask yourself, does this scene call for a polarizer? Get used to trying your polarizer for everything you possibly can. To determine the polarizer's effect, rotate the outer element 360 degrees as you peer through your viewfinder or while viewing the LCD in live-view. Often, just holding the polarizer to your eye and rotating it slowly is enough to determine its benefit. Either way, if you can't see a change, you probably don't need to worry about a polarizer.
Three Polarizer Pitfalls To Avoid
> Lost light. A polarizer costs you one to two stops of exposure, depending on the polarizer and the amount of polarization you dial in. Since aperture manages depth, landscape photographers usually compensate for the lost light with a longer shutter speed—one more reason to use a tripod.
> Differential polarization. Because a polarizer's effect varies with the direction of the light and wide lenses cover such a broad field of view, light strikes different parts of a wide scene from different angles. The result is differential polarization: parts of the scene that are more polarized than others.
Differential polarization is particularly troublesome in the sky, appearing as an unnatural transition from light to dark blue across a single frame. This effect often can be reduced, but rarely eliminated, with careful dodging and burning in Photoshop. Better yet, avoid images with lots of boring blue sky.
Page 2 of 4
Get 11 Issues of Outdoor Photographer for only $14.97!
That's 77% off the cover price!