Does anyone have any experience with these? I can't really justify jumping the gun and buying the Canon 100mm f/2.8 Macro that I want. I think using that money to start my 6-day old daughter's college fund is a more responsible way to go. And really, the $1300 or so I've spent on camera gear in the last 8 months is probably more than my income justifies already! But I want to take close up pictures of my daughter's little ears, and fingers, and so on. I was thinking of renting a macro lens, but that seems expensive enough that I'd rather just buy a $400 lens than pay $80 to rent it for three weeks. I've tried using the reversed lens trick with my 50mm f/1.8, but actually that's so close that I can't even fit her whole little ear in the frame! (Not to mention the lack of metering and depth of field control.) I was thinking of buying something like this: http://www.bhphotovideo.com/c/product/10173-REG/B_W_65076613_52_mm_Close_up_NL.html I know it won't measure of up to a real macro lens, but I also kind of think that baby toes don't really require the sharpness that photographing insects or parts of plants, etc., do. What do the wise think? I guess for $20, I can't really lose though. You know. Except for $20.