<p>These answers don't get to the point, I think. Yes, the difference between 4/3 and 35 mm is 2x, but the meat of this question is will a C mount lens cover a 4/3 frame.<br>
Having once used a lot of C mount lenses professionally, albeit years ago, I can't imagine that any C mount lens would be used on a 35mm camera. The chances of it covering all the frame are 0. I would be surprised if a c mount lens could cover a 4/3 sensor, and it's likely the results would have to be cropped to a square. A 16mm frame is really tiny, about the size of my thumbnail. much like the sensor in small compacts. So, if you have some C mount lenses you want to play with, more power to you, there were some really good lenses made for that format, but just have fun.</p>