Brilliant! I was just playing with an old optical device I have, with "AO" engraved on it. It has two levers to focus, and I figured it was an American Optical telescope ocular. But I wasn't sure. So I duct taped it onto a big cardboard packing tube, and held it up to the lens. Pointing out the front door, I could see bugs crawling on the fence post up the street! Thanks, I'm going to make this a little more workable with some PVC pipe.....!