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Aperture Priority (Av or A) Aperture priority can

Aperture Priority (Av or A) Aperture priority can be thought of asa ‘semi-automatic’ shooting mode. When this is selected, you as the photographer set the aperture and the camera will automatically select the shutter speed. So what is aperture and when would you want to control it?The aperture is the size of the opening in the lens through which light is allowed to pass whenever theshutter is opened – the larger the aperture, the more light passes through.The aperture is measured in ‘f-stops’ and is usually displayed using an ‘f-number’, e.g. f/2.0, f/2.8, f/4.0, f/5.6, f/8.0 etc, which is a ratio of focal length over diameter of the opening. Therefore, a larger aperture(a wider opening) has a smaller f-number (e.g. f/2.0) and smaller aperture (a narrower opening) has a larger f-number (e.g. f/22). Reducingthe aperture by one whole f-stop, e.g.f/2.0 to f2/8 or f/5.6 to f/8.0, halves the amount of light entering the camera.Aperture is one of the most important aspects of photography asit directly influences the depth of field – that is, the amount of an image that is in focus. A large depth of field (achieved by using a small aperture (large f-number)) would mean that a large distance within thescene is in focus, such as the foreground to the background of the landscape below.An aperture of f/13 was used here to give a large depth of field, ensuring that the whole image, from the foreground grasses to the background mountains. was sharpWhereas a shallow depth of field (achieved by using a large aperture (small f-number)) would produce an image where only the subject is in sharp focus, but the background is soft and out of focus. This is often used when shooting portraiture or wildlife, such as the image below, to isolate the subject from the background:A large aperture of f/4.5 was used to capture this water vole, against a soft, out of focus backgroundSo when using aperture priority, you can get complete control over your depth of field, whilst the camera takes care of the rest. . #nojoto #nojotophotography #nojotofacts #facts
Aperture Priority (Av or A) Aperture priority can be thought of asa ‘semi-automatic’ shooting mode. When this is selected, you as the photographer set the aperture and the camera will automatically select the shutter speed. So what is aperture and when would you want to control it?The aperture is the size of the opening in the lens through which light is allowed to pass whenever theshutter is opened – the larger the aperture, the more light passes through.The aperture is measured in ‘f-stops’ and is usually displayed using an ‘f-number’, e.g. f/2.0, f/2.8, f/4.0, f/5.6, f/8.0 etc, which is a ratio of focal length over diameter of the opening. Therefore, a larger aperture(a wider opening) has a smaller f-number (e.g. f/2.0) and smaller aperture (a narrower opening) has a larger f-number (e.g. f/22). Reducingthe aperture by one whole f-stop, e.g.f/2.0 to f2/8 or f/5.6 to f/8.0, halves the amount of light entering the camera.Aperture is one of the most important aspects of photography asit directly influences the depth of field – that is, the amount of an image that is in focus. A large depth of field (achieved by using a small aperture (large f-number)) would mean that a large distance within thescene is in focus, such as the foreground to the background of the landscape below.An aperture of f/13 was used here to give a large depth of field, ensuring that the whole image, from the foreground grasses to the background mountains. was sharpWhereas a shallow depth of field (achieved by using a large aperture (small f-number)) would produce an image where only the subject is in sharp focus, but the background is soft and out of focus. This is often used when shooting portraiture or wildlife, such as the image below, to isolate the subject from the background:A large aperture of f/4.5 was used to capture this water vole, against a soft, out of focus backgroundSo when using aperture priority, you can get complete control over your depth of field, whilst the camera takes care of the rest. . #nojoto #nojotophotography #nojotofacts #facts
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