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The next panel that we'll encounter in Adobe Camera Raw is for lens corrections. So let's click on that tab to open up these controls. We'll start off working with this photograph which I captured with a fisheye lens. So here we have this really exaggerated distortion. Yet I want to use this image, because I think by showing you one with exaggerated distortion it can help you understand these controls, yet also keep in mind that later in this chapter we'll use photographs that have less distortion, so we can see how we can make corrections which are more subtle as well.
Let's start off in the Profile tab. Up top we have this option which we can turn on which is called Enable Lens Profile Corrections. When you turn that on what will happen is Camera Raw will tap into this database of information that it has embedded into it. There's information about different cameras and lenses and about how these various combinations can cause or create distortion; it will then correct any issues. Well, you can see that what it's done here is actually pretty dramatic. Here's the before, now here's the after.
It picked up that I used a Canon camera and that I also was using this fisheye lens. Than next underneath you notice we have these correction amounts, we can either bring back some of the original distortion that was there in the file or we can remove even more and by clicking and dragging this to the right, you can now see we're really removing a lot of the distortion. We also have a Vignetting slider; drag to the left we'll see more vignetting, drag to the right we'll see less. With this image because it's so dark we're not going to see that very well, so I'll show you that control on another image.
Next at the bottom we have Remove Chromatic Aberration, you almost always want to turn that on. I'll talk more about that in a subsequent movie. Well here under the Profile tab you can see that you can turn this option on and again it can help to correct some of the distortions or some of the problems that you may have with your photographs. Well, now that we've seen how this profile tab works, let's also explore how the manual controls work and let's do that in the next movie.
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