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Canon® EOS Rebel XSi/450D Guide to Digital SLR Photography by David D. Busch

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Using Wide-Angle and Wide-Zoom Lenses

To use wide-angle prime lenses and wide zooms, you need to understand how they affect your photography. Here’s a quick summary of the things you need to know.

  • More depth-of-field. Practically speaking, wide-angle lenses offer more depth-of-field at a particular subject distance and aperture. (But see the “DOF in Depth” sidebar below for an important note.) You’ll find that helpful when you want to maximize sharpness of a large zone, but not very useful when you’d rather isolate your subject using selective focus (telephoto lenses are better for that).

  • Stepping back. Wide-angle lenses have the effect of making it seem that you are standing farther from your subject than you really are. They’re helpful when ...

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