2. Great Vignette Control
Whether you want to add or remove a vignette, Aperture can handle it. The easy-to-use Devignette adjustment removes any unwanted darkening at the edges of your image. You can adjust how much the image is brightened as well as the size of the vignette removal. Going the other direction, you can now add Exposure and Gamma vignettes. The Exposure vignettes simulate a lens-created vignette, while I prefer the Gamma to create a more stylistic effect.