800, 1600 or higher) means a high sensitivity to light. 100 or 200) means low sensitivity to light – which is exactly what’s needed in bright conditions in order to avoid overly-exposed photos.Ī high ISO value (e.g. ISO can be adjusted to make the sensor more or less sensitive to light.Ī low ISO value (e.g. Therefore ISO affects the exposure of the image. ISO refers to how sensitive your camera’s sensor is to light. This is used in long exposure photography, for example, to capture a veiling effect on water, light trails at night, or a sense of movement in your image. If you’re hand-holding your camera, rather than using a tripod, a fast shutter speed is desirable in order to avoid blurring from camera shake.Ī slow shutter speed will capture any movement as motion blur. This is perfect for sports and action photography. In addition to contributing to the exposure, shutter speed controls how motion is captured in your photos.Ī fast shutter speed will freeze any movement in the scene. 4 seconds, 1 second, 1/60th second, 1/250th second, etc.Ī 4 second shutter speed is much slower than a 1/250th shutter speed, and lets more light reach the camera’s sensor, resulting in a brighter image. Shutter speed is measured in seconds or fractions of a second. Therefore the shutter speed affects the exposure of the image. A slow shutter speed exposes the sensor to a lot of light. A fast shutter speed exposes the sensor to very little light. The shutter speed can be adjusted to be faster or slower. Shutter speed refers to how long the camera’s sensor is exposed to light when you take a photo. This is perfect for portrait photography. This is perfect for landscape photography.Ī shallow depth of field means that only part of the image will be in focus and the rest will be blurred. This refers to the amount of the image that is in focus.Ī large depth of field means that all or most of the image will be in focus whether objects are near or far away. In addition to contributing to the exposure, aperture controls depth of field. At f/2 the aperture is very large and lets lots of light in, whereas at f/22 the aperture is very small and lets much less light in. One thing that people often find confusing is that the larger the f/number the smaller the aperture. how light or dark it is.Īperture is measured in f-stops, often referred to as f/number, e.g. Therefore, the size of the aperture affects the exposure of the image, i.e. A large aperture lets a lot of light through. A small aperture lets very little light through. The aperture of the lens can be adjusted to be smaller or larger. When you take a photo, light passes through this opening and reaches the camera’s sensor, creating an image. ApertureĪperture refers to the size of the opening in your camera’s lens. The exposure triangle helps you understand how aperture, shutter speed and ISO work together to determine the exposure.īefore you learn how to use the exposure triangle, let’s look at aperture, shutter speed and ISO. There are three fundamental elements which control exposure on a digital camera: aperture, shutter speed and ISO. When a photo is over-exposed (too bright), detail will be lost in the highlights (brighter areas of the image). If a photo is under-exposed (too dark), detail will be lost in the shadows (darker areas of the image). When taking a photo your aim should always be to achieve the best exposure possible, so your photo doesn’t appear too light or too dark. Exposure refers to how bright or dark the resulting photo is.Īchieving a good exposure is essential for creating high quality, visually appealing photos. When you take a picture, light from the scene enters the camera and hits the sensor, creating a digital image. Do your photos sometimes come out too dark or too bright? Getting the perfect exposure is a common problem for even the best photographers, and the best cameras! In this tutorial, you’ll learn how to use the exposure triangle to take control of your camera’s aperture, shutter speed and ISO settings – so that you can shoot perfectly exposed photos every time.
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