For photography enthusiasts, the ability to control aperture and shutter speed is key. The Aperture- and Shutter-priority modes on the Canon PowerShot SD4000 IS Digital ELPH make it easy for anyone to take extra control over the look and feel of images captured.
In Aperture-priority mode, you set the aperture and the camera automatically selects an appropriate shutter speed. This lets you create sharp subjects with beautifully blurred backgrounds, and landscapes with foreground, middle ground and background all in focus.
Shutter-priority mode lets you choose a shutter speed while the camera automatically selects the aperture. Higher shutter speeds are great for catching stop-action shots of moving subjects, while lower shutter speeds can create atmospheric blur.