I built a device like this before they were available commercially. I was happy to find this one. It works great on my older Fuji S3, but now this one is too small for newer cameras with larger displays like my Nikon D200. Hoodman is making a larger one but it has terrible barrel distortion. I need a larger one without the distortion.
I bought a unit today but cannot yet install it as all the instructions are in German. I tried to go to the web for some English instructions but couldn't find anything except reviews and price.