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Choosing the Right Lens for Nature and Landscape Photography by Rob Sheppard

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Focal Lengths

The effect of focal length changes with camera format

Digital photography includes three major image formats. A specific focal length is meaningless without knowing the format, which is based on sensor size. For example, a 35mm lens is always 35mm, but depending on the format, it could be a wide-angle lens, a normal lens, or even a telephoto. Traditionally, lenses have been categorized by wide-angle, normal and telephoto. Today, they include super-wide, fisheye, short telephoto, medium telephoto, long telephoto, and even super-telephoto. Each refers to a specific way a focal length projects the world onto a sensor.

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Poring Over the ...

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