The Photographer's Ephemeris is a great tool for any photographer who likes to work outdoors. As any outdoors photographer will know, planning a shoot can be tricky as it involves a number of considerations: weather condition, time of day, physical location and so forth. The Photographer's Ephemeris offers a handy way of keeping track of all of these elements in one place. Pick a location on a map, look up the current atmospheric conditions, and be sure that your next shoot will be spot-on!