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Another unwanted element that you may get in a digital photo like this one that you won't see when you're zoomed out to the default fit on screen view is chromatic aberration. Let me zoom in, so you can see that there is some chromatic aberration in this photo. If you look at the edges of these trees, for example, you can see a magenta line over here, and a green line over here, and if I click and drag to pan over to the tower, you can see a slight green line to the left side of the tower. Fortunately, there is a quick way to remove chromatic aberration from this photo.
Here in the Develop module, I'll scroll down to another panel, the Lens Correction panel, and I'll click on its title to open this panel. In the Lens Correction panel, I click on the Color tab, and here is a checkbox labeled Remove Chromatic Aberration. All I have to do is click in that checkbox, and like magic, that green line is gone on the tower, and if I come over to the trees, I can see that most of the chromatic aberration is gone. I still see a little bit of a green in here, so what I'm going to do is come down to these sliders, and drag the green Amount slider over to the right slightly.
Down here is a slider that controls the range of greens that are being reduced. I want to expand that range, so I'll drag these sliders over a little bit, until I've removed most of that green from the trees. Finally, I'll be sure to pan around to other high contrast areas of the photo to make sure that I don't see any other bits of chromatic aberration, and when I'm satisfied, I'll click to zoom back out.
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