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

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Quality Settings

You can choose the image quality settings used by the XSi to store its files. You have three choices to make:

  • Resolution. The number of pixels captured determines the absolute resolution of the photos you shoot with your Rebel XSi. Your choices range from 12.2 megapixels (Large or L), measuring 4,272 × 2,848 pixels; 6.3 megapixels (Medium or M), measuring 3,088 × 2,056 pixels; to 3.4 megapixels (Small or S), measuring 2,256 × 1,504 pixels.

  • JPEG compression. To reduce the size of your image files and allow more photos to be stored on a given memory card, the XSi uses JPEG compression to squeeze the images down to a smaller size. This compacting reduces the image quality a little, so you’re offered your choice of Fine compression ...

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