Understanding the Concept of Exposure

Often after buying a good digital slr camera and point & shoot, we are fixated on auto mode for longer periods of time. Auto mode is the most convenient and fast, but do not give creative satisfaction.
For those who want to "pass and rising class" of auto mode and want meyalurkan creative spirit into the resulting photographs, it helps us understand the concept of exposure. Renowned photographer, Bryan Peterson, has written a book titled Understanding Exposure which also explained the concept of exposure is easy.

Peterson members illustration of three elements that must be known to understand the exposure, he named his third relationship as a triangle Photography. Each element in the photographic triangle relate to light, how light enters and interacts with the camera.

The three elements are:

• ISO - the measure of how sensitive the camera sensor to light
• Aperture - how much the lens is open when the photo was taken
• Shutter Speed ​​- the span of time "window" in front of the camera sensor is open

Interaction of these three elements is called exposure. Change in one element will lead to changes in other elements.

Assumption of Exposure Triangle

Perhaps the easiest way to understand the exposure is to give a parable. In this case I like the parable of the exposure triangle like a water faucet.

• Shutter speed for me is how long we open the tap.
• Aperture is how wide we open the tap.
• ISO is a strong impetus from the water taps.
• While the water flowing through the taps are received light sensor camera.

Certainly not a perfect metaphor, but at least we got the basic idea. as you see, if the exposure is the amount of water coming out of the faucet, then we can change the exposure by changing the value of one or a combination of all three constituent elements. You change the shutter speed, means changing how long the water tap is open. Aperture change means changing how much water flow, while changing how strong encouragement from the water source.

more on http://belajarfotografi.com/memahami-konsep-eskposur/