The new Lens Correction filter in Photoshop CS2 is a useful new tool for correcting common lens-related distortions and perspective problems. This illustrated excerpt from Colin Smith's book, How to Do Everything in Photoshop CS2, shows how to use the Lens Correction filter to straighten an image taken at an angle, correct keystoning (one end appearing narrower than the other due to a low shooting angle), and fix image bulge caused by a wide angle lens.

You can download another PDF from the tips section of the Adobe site that explains the Lens Correction filter. This article is adapted from the popular Total Training Video Workshops. It offers another example of how to use the Lens Distortion filter to fix distortion caused by lens length, shooting angle, and camera tilt. It also summarizes the other capabilities of the multi-faceted Lens Correction filter: repairing chromatic aberration (color fringing at image edges), eliminating vignetting (darkness at image corners), rotating to a precise angle, filling the empty edges of a corrected image, and saving settings as the default for photos taken with a certain camera, lens, or focal length.