In this beginner photography guide Digital Camera World explain everything you need to know about the optical filters that matter in digital photography (and motion picture).
For instance, being able to change the white balance from shot to shot, either in-camera or later when you process your images, means that you no longer have to use colour correction filters to warm up or cool down an image before you take it.
That’s not to say that all filters are redundant in digital photography. For instance, a close-up filter, which essentially acts as a magnifying glass, offers a cheaper alternative to a dedicated macro lens.
But the truth is that you only really need two types of creative optical filter: a polariser and a neutral-density filter. The reason for this is that their effects are time-consuming, and sometimes near-impossible, to recreate authentically in post-production.
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