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Photographing lightning strikes and other ultra-high-speed events is next to impossible without the aid of some kind of triggering system, due to the rate at which these anomalies occur. Ubertronix Strike Finder triggers are an intelligent solution.
Not long ago, filters were part and parcel of any worthwhile camera system. If you wanted to warm up the palette of a dreary day, you used a filter. Ditto for converting daylight to tungsten light, tungsten to daylight, and daylight to (or from) fluorescent lights.
With the exception of the filters used for black-and-white photography (see the article Black & White Landscape Photography) the numbers of filters used for capturing color landscapes are few, mostly due to the fact that, in digital imaging, many white balance and filter effects can be addressed in camera.
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.