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Rick Sammon's Exploring Photographic Exposure by Rick Sammon

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4Especially Important Exposure Triangle Settings

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There are several situations in which paying extra attention to your aperture, shutter speed and ISO are important. For now, let’s take a look at just a few. I’ll cover more situations later on in this book.

When photographing with telephoto lenses and when depth-of-field is important—As the focal length of the lens increases depth-of-field at any given point, aperture decreases. In the first rockhopper penguin photograph, taken in the Falkland Islands, I wanted to get the animals’ bodies, especially the eyes, in sharp focus while blurring the background. Because I was using my Canon 100–400mm ...

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