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Adobe Photoshop CS4 Studio Techniques by Dan Ablan, Ben Willmore

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Lens Correction Filter

The Lens Correction filter (Filter > Distort) is designed to correct for distortion that’s caused by the camera lens itself, or by the angle of the lens relative to the subject of the photo. Let’s start off with a quick tour and then get busy fixing some images. Since this filter is often used on subjects that contain a lot of vertical and horizontal lines (such as buildings), a grid is provided to help you see when you’ve removed all the distortion from an image (Figure 11.110). You can toggle the grid on and off with the Show Grid check box, control the amount of space between grid lines with the Size setting, and reposition the grid by using the Move Grid tool (which looks like a hand on top of a grid).

Figure 11.110. ...

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