Diffusion Filters

Filters for Lenses

If you ask most consumer-camera owners why they keep a filter on their lens, a majority will most likely reply, “For protection.” Although filters do, in fact, protect the surface of your lens against dust, moisture and the occasional thumb print, the primary function of lens filters is really to improve the image quality of the pictures you take—depending on the filter you’re using and how you use it—in a variety of obvious and not-so-obvious ways.

Essential Gear for the Working Pro

As a working photographer, the center of the universe is your camera bag and its contents. Your cameras and lenses are the tools of your trade. As you may have noted, both are mentioned in plural because just as you wouldn’t jump out of an airplane without a backup parachute, you shouldn’t attempt to photograph an emotionally spiked, non-repeatable event armed with only one camera.

HDSLR Guide Chapter 4: Filters

While many "looks" can be achieved in post-production, certain aspects of the image are better controlled before the image is recorded. Optical filters modify the light before it enters the lens. The benefit of using optical filters instead of digital filters is that there is no added time in post production and less degradation of the image quality, especially in HDSLRs, which already have limited color space and a highly compressed image.

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