hey everyone! i need advice on fisheye lens for my panasonic lumix dmc fz28, does anyone know where i can buy the fisheye lens and how much does it cost?

i look on amazon, its going at US$29.95, I'm not sure if it's good.

Here's the link: http://www.amazon.com/Opteka-Panoram...5762442&sr=8-1

Not sure if I can post a link here though, many thanks!