A visual representation of the exposure values of a digital image. Histogram. This histogram usually has a monochromatic display—either white data on a black chart, or vice versa. • It's the greatest invention since the built-in light meter. There is a lot more to know about the histogram, and you can use it when you process your images in Photoshop or Lightroom, as well. The number of pixels representing each tone is viewed on the vertical axis. When looking at histograms in photography, the darks are represented on the left, mid-tones in the middle, and lights on the right. The camera was set to Manual shooting mode and the aperture and shutter speed were set to maximize contrast. I do slightly disagree with his tip on having a mountain in the center is the best option, as it does depend on the subject. Understanding Your Histogram • Understanding image histograms is probably the single most important concept to become familiar with when working with pictures from a digital camera. The histogram can tell you whether the image was underexposed or overexposed. The histogram is basically a graph that represents the maximum range of light values your camera can capture, in 256 steps (0 = pure black, and 255 = pure white). Just keep in mind that, if you shoot in JPEG format, nailing the exposure in-camera is even more critical. Despite the impressive dynamic range of the camera, (the Canon EOS 5D Mark III), the photo blows out details in the window and pushes the dark areas off the left side of the histogram. Understanding Your Histogram. If you need to adjust these values, the camera's white balance control is the way to do it. In the middle of the histogram are the mid-range values that represent middle colors like grays, light browns, and greens. Histograms are most commonly illustrated in graph form by displaying the light values of the image’s shadows, midtones, and highlights as vertical peaks and valleys along a horizontal plane. Study the histogram to decide whether the camera — or you, if you manually exposed the image — properly exposed the image. The Camera Histogram Explained. • The ability to interpret histograms is key to getting proper exposures with your digital camera. A histogram is a wonderful thing: It’s a graph — well actually it looks more like a mountain — that shows the distribution of pixels from shadows to highlights. This video does a great job of explaining how the histogram on your camera works and how to read it. By using the tools your camera provides you, it’s easier to understand how to adjust your image exposure. Several Nikon cameras feature secondary, color histograms. Choose to display them and you'll see three small graphs that show the intensity of the RGB (red, green and blue) color values in the scene. The primary one is the luminosity histogram that shows overall brightness of a scene. 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camera histograms for dummies

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