The exposure triangle is a common way of associating the three variables that determine the exposure of a photograph, these are: aperture, shutter speed, and ISO. A person must balance all three of these to achieve a desired result as they have a significant impact on how your photos will look and feel. Aperture, affects the depth of field, or how much of an image appears sharp. Shutter speed also affects image sharpness, with slower shutter speeds leading to blurred images and faster shutter speeds resulting in sharper images. The choice of ISO enables you to use the optimum combination of aperture and shutter speed when the amount of light would normally prevent you from doing so. However, increasing the ISO also reduces the quality of your images.