Saturday, November 3, 2012

Digital Photography Tutorials - Camera Exposure - Part 1

Camera exposure basically determines the extent of darkness of lightness of an image when it is captured. While that might seem like a very important factor (which it is), the same can be controlled by the right setting of 3 elements, also known as the exposure triangle. These are the shutter speed, ISO speed and aperture. Once you have these three rights, you are sure to click the perfect picture. This digital photography tutorial is going to explain how you can do that.

To give a more simple explanation of the camera's exposure, think of it as a bucket in which you have to collect rain water. When there is a very high rate of waterfall, three factors are important for the task at hand - the quantity of water you want to collect, the time duration it is left exposed to the rain, and the width of the bucket. The right mix of these ensures that you don't collect too little (and underexposed photograph) or too much (overexposed). There are many factors that would determine how you mix and match these components. For instance, if the rain is falling at a faster pace, leaving the bucket out even for a short while can do the job. This is in direct relation to the fact that the light, just like the rain, is not under your control, and you need to make suitable adjustments depending on the situation at hand.

Here's a brief of what each aspect of this triangle does:

Aperture is responsible for the area over which light enters the camera.

ISO speed is responsible for the sensitivity of the camera's sensor to light.

Shutter speed is responsible for duration of exposure.

Here, while you might think that it's a relatively easier job to get the right exposure, what this digital photography tutorial aims to highlight is that you would almost certainly have to choose between which aspect you want to focus on. Think of it as a trade-off - shutter speed impacts motion blur, ISO speed impacts image noise, and aperture impacts depth of field. Changing the setting of one is sure to have an impact on the other. Choose wisely.

John Hussain is a renowned digital photographer. He has travelled across 3 continents on photography assignments, and is currently a prominent authority on digital photography. For More Information Visit digital photography tutorial.

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