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taking pictures 2 “O kay, so you have all these lenses in the camera,” Meredith said to Colin. “But I saw you twisting the lens. Why did you do that?” Meredith was actually interested in her brother’s photography lesson, but didn’t quite want to admit it. Colin smiled and spun a dial around the camera. “This dial makes the hole through which the light passes bigger or smaller. That changes the amount of light that comes into the camera in that split second that the shutter is open.”

Meredith peered at the front of the lens. “So what exactly happens?” “Let me show you.” Colin spun the lens to its most open position.

“This opening is called an aperture ,” he said. “In this position, it is widest. It will let in the most light.” He spun it again. “And this is the smallest aperture. It lets in the least amount of light.” Meredith shook her head and asked, “But what does opening and closing the aperture do?

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