The S90 sports an f/2.0 aperture, perfect for creating enticing portraits, by drawing attention to the face and blurring the background with its impressively shallow depth-of-field. The Macro setting lets you get even closer. The large aperture also does more. It lets you capture more nuances in low light shooting by using more of the available light. You'll be ready for anything with a lens aperture larger than even many professional sizes.