(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. How to use a histogram to expose photos.Understand the interplay between these three elements, and you will be able to anticipate great photographs, rather than wait for happy accidents. But, as adept as modern cameras have become, they aren’t perfect, and they’re not good at making artistic decisions.Įlevating your picture-taking from good to great requires a general understanding of the three elements of exposure: aperture, shutter speed, and ISO. If you only shoot in automatic mode, you’re accustomed to the camera taking care of all the settings. How do aperture, shutter speed, and ISO work together?.
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