When you take photos you may notice a darkening in the corners of the image. This is called vignetting, and is a limitation of the lens you are using to produce a clear image, although it isn’t too common on your iPhone, certain lens – particularly SLR lens and macro lenses will produce it. Good camera settings will help you avoid this for the most part, however sometimes it is easier to remove post processing. In this example we are going to use the built in app Photos to remove it.
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