With the ease at which we can post-process an image these days, the concept of using a lens filter is often overlooked. Filters do a lot to improve the quality of your photos, head and shoulders above any post-processing that you can apply. The reason is simple: You are controlling the data that actually gets to the film or sensor. Filters serve one primary function: Controlling light.

If you are a landscape photographer, you should have a fairly nice collection of filters in your bag. You’re dealing with an uncontrollable light source (the sun or moon), the best way to control light in your shots is to use a filter. Here are a few filters that no landscape photographer should be without.

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