For class we were asked to take four pictures to show that we understand the three things that make a great picture. For my pictures I took ISO and aperture to their extremes on my iPhone. The first two pictures are differences in ISO. You can tell by the pictures how one is more grainy than the other. Because there is more light in a higher ISO, the photo is comes out grainy, compared to the lower ISO which has barley any grain changes in the background.
The next photos show the change in aperture. Aperture is the changing in the opening of the lense. This either allows more light or less light in. The size of the lens opening can be seen in the difference depths of the photo. Wile one photo is clear from front to back, the other is blurry in the background.
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