Sorry for being such a noob, this is probably a simple question. Is a 'macro' lense just a lense that's 100mm or more. Every time someone mentions a macro lense it looks like one of the massive lenses(again, over 100mm) that cost a fortune. Don't get me wrong i understand the whole point of a macro photograph is to have a shallow depth of field where you focus on a particular part of your subject and have everything else blurred out. (differential focus?) It's just the lenses that confuse me...there's so many different ones lol.