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High Dynamic Range (HDR) photography allows photographers to capture the entire tonal range of an image. HDR photography makes use of a number of bracketed images and lets you capture more image detail than would be possible in a single photograph. In order to make this work, a sturdy tripod is recommended to capture a minimum of three identically positioned exposures (though five or more are recommended for accuracy). While it is possible to create hand-held exposures, your images will be subject to shifting and could suffer from ghosting problems.