33 Correcting Lens Errors and Distortion in Architectural Images
Wide-angle lenses have the property of distorting perspective provided they are not shift lenses, and the zoom lenses of most manufacturers distort more often along the edges; in other words, they produce barrel or pincushion distortion in architectural photos. In addition, these zoom lenses can cause vignetting when used with a fully opened aperture. With regard to digital photography, a special problem of wide-angle lenses is chromatic aberration, or color fringes, in the edges of images, of interest only in color photography, of course.
All these problems can be corrected with one single tool, namely the Lens Correction filter introduced in Photoshop CS5. This tool includes profiles ...
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