When you set the shutter speed – usually measured in fractions of a second (e.g. Whereas the aperture determines the amount of light that’s coming through the lens, the shutter determines the length of time the sensor will be exposed to that light. The shutter lives just in front of the imaging sensor, and the shutter speed is the amount of time it stays open, like 1/60 second.Īperture and shutter speed work together. Just like the shutters on a window, a camera’s shutter opens to allow light in. Daven Mathies/Digital Trends What is shutter speed? When thinking about the f-stop, choose a smaller number (larger aperture) to achieve a shallower DOF, or a larger number (smaller aperture) to increase DOF.Ī large aperture (small f-number) can separate the subject from background and/or foreground. ![]() An image with a large DOF will have sharp focus from foreground to background, while a small, or shallow, DOF sees the focus concentrated on one particular plane, with foreground and background elements blurred away. Simply put, DOF is how much depth will be in focus within the image. (Hint: A lens’ maximum aperture will be part of its model name, like a 50mm f/1.8 or a 24-120mm f/4.)īeyond controlling the amount of light, aperture determines an image’s depth of field (DOF). How large your lens’ aperture can open will depend on your lens. So, when you are adjusting the settings, think of the opposite: If you want less light to enter (small aperture), go for a larger f-stop. ![]() By changing the aperture value, you increase or decrease the size of that opening, thereby allowing more or less light into the camera.Īperture is measured in f-stops, such as f/16 and f/4, but here’s the thing: The smaller the f-stop number, the larger the opening, and vice versa. The aperture is simply the opening within the lens that limits the amount of light that can pass through it. When you have a basic understanding of aperture, shutter speed, and ISO – which are also the basics of photography, in general – you’re well on your way to mastering your camera, even if you never open the user manual.
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