Archive for the ‘Digital Photography Basics’ Category

Digital Photography Basics: Adjusting Exposure

Thursday, April 7th, 2011
Most camera's light meters would read the dark areas in the background and overexpose these dogwood blossoms. To correct for this, you need to either override the meter with exposure compensation, or adjust the exposure manually.

Most camera's light meters would read the dark areas in the background and overexpose these dogwood blossoms. To correct for this, you need to either override the meter with exposure compensation, or adjust the exposure manually.

In the first part of this series I explained one of the most fundamental aspects of digital photography: reading histograms. In this edition I’ll delve into the next step: how to adjust the exposure when the histogram doesn’t look right the first time.

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Digital Photography Basics: Reading Histograms

Thursday, February 3rd, 2011
Understanding how to read a histogram is the best way to judge exposure in high-contrast scenes like this.

Understanding how to read a histogram is the best way to judge exposure in high-contrast scenes like this.

With film, exposure always involves some guesswork—you can never be sure you made the correct exposure until you develop the film. But with digital cameras you can tell immediately whether the right amount of light reached the sensor by looking at a histogram. This ability to instantly evaluate exposure is a game changer—the single biggest advantage of digital photography over film.

But many photographers are still guessing about exposure because they’re unable to decipher the histogram’s cryptic messages. Instead they judge exposure by how bright the image looks on their camera’s LCD screen. But while those little screens are extremely useful for many things, evaluating exposure isn’t one of them. There are too many variables: screen quality (usually bad), the LCD brightness setting in the camera, and the amount of ambient light.

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