Originally Posted by and
A reverse adapter lets you mount a lens backwards on another lens, typically a 50mm lens. lets say you use the kit lens and then put a reversed 50mm on it. The 50mm acts as a magnifying glass. Bellows is another way to get more magnification. extension tubes is another. 50mm extension tubes on a 50mm lens gives 1:1 magnification.
There are many ways of achieving the same thing. In your case I think i would go for closeup filter which fit well with the 50-200. I find the 50-200 to be very good optically and have very nice bokeh and goes good with closeup filters. Although this will not give you 1:1.
There's actually two different ways to do that.
There's a reverse mount adapter (directly reverse mounts a lens to your camera body), and there's a reverse coupler adapter (reverse mounts a lens to another lens).
I use a reverse coupler for 1:1 but you have to get so close... 1-2" focusing distance. Yuk.
