I am starting to get into macro photography and am wondering why so many photogs say you need a tripod. Is it because you are working with a much tighter depth of field, so focusing is difficult? I have looked at several pictures and most are done with medium aperture (anywhere from 5.6-16) and in the 1/200 and up. So I am a little confused at to why one would have to use a tripod at say 5.6 and 1/200...camera shake shouldn't be that much of a problem right? or is it because the subject is so small and liable to get out of sharp range with slight movement on the photogs part?
Thanks for any help.