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Macro = close up photography. Historically this has come to mean being able to focus on an image and produce an image on 35mm film approaching or equal to the size of the image itself - 1:1. Sometimes vendors even use 1:2 conversion factors to refer to macro capability (image on the film half the actual size). With modern digital cameras that do not use film this reference is getting to be less significant. Now days most camera vendors just tell you how close you can get to an image. Keep in mind that a macro lens is optimized to focus sharply on a small area approaching the size of the image near its closest focus point. Close up lens kits will get you closer to your subject, but the sharpness and lack of other visual distortion issues of the resulting image will not be as good as using a quality macro lens. It gets you "there", but with compromise. I have similar lenses that you have and if I can I will try and take a few pictures of an orchid with each and show you the difference later this week compared to my 100! Good questions.....
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