As soon as I find an adapter for my D40, I will order one of these. I am a little concerned about the portability of a 30 meter rotating pool of mercury, and the payments, but what the heck, it can see back in time.
Eeehh... it was written 27 years ago (1982). If it had any real, practical value, it would have been built by now; but as with most "academic" papers, I think their idea has more to do with wanting to be published rather than trying to solve a real problem or satisfy a real need of society
You can only point the telescope straight up, and it's so sensitive that even on an optical breadborad, anyone walking within 50 meters of the mirror causes it to distort. That's beside the fact that I prefer my optical instruments to be mostly free of carcinogenic cancerous liquids
