A passionate photographer based in Nashville, Tennessee, Benjamin “Ben” Perlin instinctively knows how to frame the world around him. Preferring to shoot with film, Benjamin Perlin regards every photograph as a physical event that involves feeling the press of the trigger and hearing the shutter click.
The exposure of a photograph is controlled by the ISO, shutter speed, and aperture.
ISO refers to how sensitive a camera is to light. It is denoted by numbers, such as ISO 100, 200 or 1600. The higher the number is, the more sensitive to light the camera is. When the ISO is high, pictures do not need a large amount of light exposure and photographers should use a high shutter speed to prevent their images from becoming over saturated. Once photographers understand how ISO changes their images, they are capable of shooting in varying light conditions.
Shutter speed affects how much light is let into the camera and is typically measured in fractions of a second. Fast shutter speeds leave the camera open to light for a very brief amount of time and are used for capturing motion without a blur. Meanwhile, night and low-light photographs benefit from slower shutter speeds because they allow more light into the camera.
Finally, aperture is the hole within a lens through which light travels. This aspect of photography is measured in f-numbers, such as f/1.4 and f/8.0. The f-number denotes the ratio of the lens length to the diameter of the aperture. When the numbers are smaller, the aperture is more open. Changing the aperture gives photographers control over their depth of field. Larger apertures provide a shallower depth of field, and smaller apertures create a wider depth of field.
