How does reproduction ratio relate to close up photography?

fastmacbookpro

New member
I would like to have a clear, understandable answer that a ten year old would understand. I am having a lot of trouble with reproduction ratio, how it relates to close up photography and finally, how would a ratio of .13 be for close up. Please be nice and understand that I am very confused.
Thanks in advance.
Ok, more basically. I'm looking at a nikon lens that has a "maximum reproduction ratio of .13x"
It's the 105mm AF DC f/2
What does this mean???
TO qrk or anyone else, couldn't you just get closer?
 
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