Dennis,
There may be such an adapter. But be careful. The image that the 2/3″ lens projects onto the chipset is much larger than the camera will be looking for. As a result the widest setting on the lens will not be nearly as wide as you would expect – (i.e if it were on the 2/3″ chip camera it was designed for)
I have a cannon wide angle lens that came off of a 1/2″ camera. Using an adapter, I can mount it on my HPX300 (1/3″ camera). So I give up quite o bit of “width” but I’m OK with it in most situations since it’s much better glass than the stock lens that came with the HPX300.
Putting a 2/3″ lens onto a 1/3″ is likely to exasperate that issue to point of futility. Perhaps there are adapters that actually reduce the image to project onto the 1/3″ chipset. I didn’t see any such adapter wen i did my search 7 months ago when I bought my 300.
Best of luck,
Steve
Production is fun – but lets not forget: Nobody ever died on the video table!