What is a cheap good quality fisheye lens for a Nikon d3000?

I just got a Nikon d3000 for my birthdayy and i really want a fisheye lens. I want a cheap one until i can get a better one. I want to learn how to use it. And i wanted to know if any of yall know a good brand for that? Also if you guys think these would be okay to buy for a first time fisheye?
http://www.amazon.com/...002Q10Y9I/

http://www.amazon.com/...0017W70JE/

let me know if yall think that those would be good?

There's no such thing as a cheap good quality fisheye. Fisheye lenses are difficult to manufacture and are highly specialized. The ones you are looking at are junk. The will heavily distort your images. A good fisheye lens will cost at least $500. Anything less is junk.

Those screw-on lenses are all rubbish. As long as it's 52mm it should do the trick