I want to get a little more zoom out of my N55 and a little more versatility.. I also want to get a fisheye lens. I keep seeing for example the fisheye lens on ebay for $34.99 and it says .42x, and a 2x af lens for about the same price. are these ok to buy as a beginner or am I wasting my money. Keep in mind I don't have much money being a college student and I'm not ready to jump into the hundreds of dollars that quality lens' cost.