A photograph of an object or part of an object taken at high magnification in order to reveal details of form and structure. Many of these are taken automatically for documentation purposes during the use of such instruments as the scanning electron microscope, the petrological microscope, binocular microscope, and the optical microscope. Photomicrographs can reveal the detailed structure of palaeobotanical remains, the presence of different tempering materials in pottery, analysis of thin sections, the use-wear on artifacts, or the details of structure in metals which can help to identify metalworking procedures.