Back in the mid '90s a show on the Discovery Channel called Invention showed an invention I shall call "impossible optics", since I don't know what else to. It didn't really explain how it worked (other than a number of lenses were involved, no mention of optical gratings), and it's been so long that I've forgotten who made it. This has made it a nightmare trying to find it again. What it did - if indeed it really was doing it - was to have everything in focus at the same time, no matter how far away or close they were. A watch face a few inches from the lens and a building across the street and another shot of a caterpillar on a plant in macro-view and a crop dusting plane hundreds of meters away, getting closer and then flying over head and the dust rains down are two of a few shots they had on the show demonstrating this invention. The whole bit on the invention - talking, video and interviews - was about ten min. long, then onto another invention, which is how this show went. Fantastic show Invention was, if you ever get a chance to watch it in syndication you should. I've only seen one episode in the last ten years because nobody runs it anymore. Anyway, I'm off track... I've always been good a spotting where special effects are used - and the computer special effects of the mid '90s are a special kind of fake - so I almost totally discount this as what was going on. Plus Discovery Channel was a fully reputable network at the time and didn't show the kinds of BS they sometimes do now, so I don't think it was that either. But how did it work? This seems to break the rules of how lenses work, hence why I call it "impossible optics". If you know of any links to technical info or a link to the company that made (makes?) it that would be more than my years of searching have ever come up with.