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The key word in photo editing is “workflow”, and Aperture aims to make your photo editing process as smooth as possible though allowing you to work in RAW format from beginning to end, a move that gives you access to the maximum amount of image data your camera can generate. The Import function allows Aperture users to rename when uploading pictures to your computer as well as adjust the time zone, add captions or keywords, and, most importantly, tell your Mac whether to store images in the Aperture library, the Pictures folder, or a custom location. Aperture 2 is capable of grouping photos by timestamp (for photos shot in burst mode, for example).
Many functions will be familiar to users of iPhoto (or the earlier version of Aperture), but where Aperture 2 really shines is in its plugins - a large number of third party plugins have been produced to date, and these can provide so much capability in photo editing and processing that you may not need to work on your pictures outside of Aperture. Most plugins have a price attached; to find a comprehensive list, visit this site dedicated to Aperture 2 plugins.