loading

Need help in building a LCD screen magnifier for camera

You often want to enlarge the image you've just taken to see it in more detail. The problem is if you zoom-in, you are only focusing on a certain point of the image, not the whole. And if you are zoomed-in at the point you didn't like, you gotta press direction buttons to get to your desired point.

I was always bugged by this problem until I learned the existence of LCD screen magnifier from my instructor. This kind of item:
http://www.amazon.com/Hoodman-H-LPP3-HoodLoupe-Professional-3-Inch/dp/B001N0KEWU/ref=sr_1_2?s=photo&ie=UTF8&qid=1280803022&sr=1-2

What's cool about his magnifier was that he built it in his own, which is a pretty smart idea given that those things cost around $100.

Can any master craftsman of Instructables help me with this?

Picture of Need help in building a LCD screen magnifier for camera