Another way to get into macro photography on the cheap. This method allows for more control over the magnification, but is a bit riskier. Not sure how I feel about having a lens being held by nothing but glue. It will also put more strain on your main lens mount, so you probably shouldn't do this with a lens with a plastic mount like some kit lenses have. And you also should make sure and set it to manual focus as the extra weight could be hard on your auto focus motor.

I've heard about this, but I've seen it mentioned that there might be a risk of damage to the lenses. Do you have any idea what that might mean? I've also seen a demo without the couplers. Haven't tried it yet.