I bought these from a friend but never used them. I thought I would but I ended up buying a 100mm macro which I don't use much either. But I'll hold onto the lens since its a bit more convenient. These DG tubes are the best aftermarket macro tubes on the market and come with 12, 20 and 36mm tubes. Designed to work with the focus and exposure electronics for Canon digital SLRs. The tubes are in excellent shape and are a cheap way to turn your standard lenses into a macro lens for those close up shots. $105 shipped.
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