Follow Focus + Remote Made From K'NEX
On of the big rants of Videographers moving to HD-DSRLs is the hard to control manual focus. The focus ring on most DSRL lenses is very tight, completing a full zero to infinity cycle in about 120 or 180 degrees.
A follow focus can use gears to change that ratio. Sadly such follow focus for DSLRs are in the megabux neighborhood.
[via pc world]