Posted on Jun 29, 2009 | Comments 0
Aperture and exposure play an important role in determining the perfect pictures that are taken in photography.
First of all, many people would ask what is aperture. Camera aperture is the area in which light is let in through the lens opening.
If a lot of light is let in through the lens the picture would be very sharp for objects that are close and for the objects that further away, they would have a blurring effect thereby the amount of light is very important in determining that there is no blurring effect.
Exposure on the other hand is the total amount of light that is allowed to fall on the image sensor when a photograph is being taken. It’s usually the time in which the light is allowed in through the lens, it measured in what are called ‘Lux seconds’.
Exposure plays an important role in the world of photography, when a picture is said to be ‘underexposed’ there is a loss of shadow in an image whereby the dark areas in a photo can’t be distinguished from black and this is known as a ‘clipped blacks’.
In the case when the picture is said to be ‘overexposed’ there will be a loss of highlight detail for example when the bright parts of a photograph are all white instead of it being its original color, this is known as ‘clipped whites’ or ‘blown out highlights’.
In exposure the longer the shutter is open the brighter the light let in and the clearer the image becomes, but if the shutter speed is decreased less light is let in causing a dull picture. Photographs taken at night are said to need a longer shutter speed to let in as much light as possible. [Night Photography]
In the case of aperture it works hand in hand with the shutter speed just as the exposure does. Aperture plays a very significant role in taking pictures because once the aperture fails to open this will just produce blank pictures.
The aperture is controlled by settings called ‘Aperture Opening’ and sometimes it’s also known as an F-Stop. It’s measured by ‘F-Stop Numbers’, for example the smaller the F-Stop numbers the larger the opening thereby letting in more light e.g. f.2, 8. And when there are smaller F-Stop numbers the aperture opening will be smaller thereby this will be letting in less light e.g. f22.
Aperture and exposure are the main settings that determine the quality of your output.
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