More expensive filters are often made from high quality glass that is both optically purer and thinner than others on the market. The difference in price comes down to the quality of the materials and the anti-reflective and colour lens coatings used. There are all sorts of filters, all with vastly different price points. You also can store your filters in a protective case that will keep them clean whilst not in use. You can clean a camera lens filter with a microfibre cloth and an air blower. If not for the UV protection, a UV filter offers protection from dust, debris, moisture, scratches and the occasional fingerprint on the front element on your lens. You don’t have to have a filter but it is a good idea to have one. Do you need a UV filter for camera lenses? Finally, Matte Boxes are primarily used on video projects they have a large hood with a space for a filter without causing vignetting. Drop-in filters are used on large telephoto lenses that have specifically designed filter slots. There are filter mount systems that use square or rectangle filter plates that are locked in place. There are a couple of methods to use camera lens filters but mainly you’ll come across screw-on filters that are attached to the front element of your lens. For this example, you’ll often use square or rectangular plate filters that slot into the holder systems - These are particularly popular with landscape photographers as you can easily stack multiple filters to capture dramatic scenes. some fisheye or long telephoto lenses! These require different types of filters and/or different methods of attaching the filters such as a filter holder system. However, there are some lenses that either do not have a filter thread marker or a thread at all e.g. So, for example if it’s a 52mm filter thread, it will be shown as ø52, or if it’s a 77mm, it’ll be shown as ø77. The size is shown using the diameter symbol: ø, followed by the figure. The size of filter you need is generally determined by the filter thread size that is indicated around the front element of the lens.
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