Not very much. John Shaw's most excellent book "Closeups in Nature" covers it all and is well worth reading.
http://www.amazon.com/exec/obidos/tg/detail/-/0817440526/qid=1126618451/sr=2-1/ref=pd_bbs_b_2_1/104-2451736-3237536?v=glance&s=books a/k/a http://tinyurl.com/d3h8t Maris Shel Belinkoff wrote: > .. between a macro photo and a close-up photo? Is there some point, > some magnification, at which a close-up becomes a macro shot?