Originally Posted by Dan Chung
Actually sort of not true, ultimately focus by wire can be more accurate than any manual pulling method. What needs to happen is for a focus pull device to be made that accesses the camera directly and instructs the lens to focus at precise distances. Canon's remote software already allows focus control to a connected computer but it can't do a smooth focus pull, somebody clever could probably programme this though. This system would work very much like the system on the Sony EX-1.
That would be really cool. It doesn't exist anywhere yet, does it?