Understanding exposure when you aspire to work in photography is essential. Exposure is an element in photography that must be understood in order to grasp and begin to master the field. Understanding the relationships between ISO, shutter speed, and aperture is the key to comprehending exposure and learning to master your photo skills. The three elements combined create the balance that in the long run determines shutter speed. Learn to master these and you will soon find the many advantages that it presents to you.
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ecome the best in your field and to learn these tricks, you must understanding some of the metaphors that have been created in order to explain them. The first of these is the window. Aperture is the size of the window. The bigger the hole, the more the light comes through. Shutter speed is the amount of time that the shutters are open. The longer you leave them, the more that light comes in. ISO (low ISO in this example) is like wearing sunglasses in the room: it desensitises you to the light. The less or greater the ISO, the bigger the exposure on the film.
Understanding the correlation between these elements is fundamental. You add one of these on top of the other and you get more light or you get just the light that you want. There are a number of ways to increase the light in the room. Take off the sunglasses or make the window bigger or leave the shutters open for longer, or combine these. Depending on the effect that you want, you will need to add or remove some of these for the light to be greater or less. Carefully ascertain the exact effect that you desire for getting it just right with a proper understanding of the exposure triangle.