I was new to photography and had just bought my D5100. I stopped at a mall in Florida with my wife and went into an electronics store. I asked the salesman if they had any close-up and wide angle lenses? He said, "heck yes...and went on to show me a lens that screwed on the filter threads. He explained you could use it both ways as a wide angle and a close up lens. He said the price was $700.00, but after seeing me hesitate, said he would sell it to me for $500.00. He said it was a heck of a bargain and showed me proudly that it was made in Japan. That crappy old lens was the worse thing I've ever bought. It screwed into the lens filter of my 18-55 mm lens. I'll never get shafted like that again. He was pure scum, and I was pure dumb. $500 and I ended up throwing it away. Totally useless. I was a dumb clod hopper. That lens produced the worst vignetting I've ever seen. He was a scam artist.