I found a full box of this thing and I have no idea what it is. I do not have a digital camera, but I did my best to draw it on Paint. It's just a lens behind a donut, which can be fastened to something by tightening the rubber and metal layes around it. (sandwich around what you want to clamp it to.) It doesn't fit any of our fixtures, but I found a peice of one next to where we used to keep some parellipses. I will try to get a digital picture. But, what the heck is it called? What does it do? When do you use it? Also, what was a parellipse used for? Do they still use them sometimes today? When would you use one? (is that the right spelling?) If you know anything else about either, then please share.