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Filters: Part 2 – ND Filters | Josh McLeod

Put simply Neutral Density or ND filters reduce the amount of light entering the lens. They are available in different optical densities and are usually described/quantified by their f-stop reduction. I use these types of filters in one of 2 ways. Either to enable me to shoot at a wider apertures in bright conditions and give me greater DOF control, or for me more commonly to shoot with a longer shutter speed (long exposures), usually for landscape photography. A Graduated Neutral Density filter is similar to a regular ND filter except the intensity varies across the surface of the filter. This is useful when one region of the image is bright and the rest is not, such as the sky in a sunset/sunrise landscape scene. I often use this type of filter for landscape photography, and often conjunction with an ND filter. There are also variable ND filters available, which offer a lot more flexibility over carrying around various filters of different densities. I have limited experience with variable ND’s but each time I have used one I have experienced various issues including a loss of image quality. I have tried a number of different brands, all without success………

See on joshmcleodphotography.wordpress.com