Filters are basically tools to modify the quality of light hitting your sensor. They used to play a more integral role in photography before digital cameras came along. Nowadays, a lot of people discount the importance of photographic filters thinking that they can replicate any effect they want during post-processing. This is not entirely true. There are some filters that can never be replicated on the computer no matter how good you are with Photoshop.
Filter mounting refers to how the filter attaches to your lens. The two most common filter mountings are threaded and the square filter system. Threaded filters are circular in shape and just screw on directly to the lens. Square filters require a filter holder to attach the filter to the lens.
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Filed under: photo gear, photography
