CAVision comes to mind. None are cheap.

I am also looking into getting a follow focus, along with a 4x4 matte box. I own the 14x lense. Im definately curious to hear from someone who owns one.

stephen

I did a search but there doesn't seem to be any threads on
the follow focus system but only on the mattebox. I hope
someone tunes in, otherwise you might be the first to really
test it out...

Stephen, I am selling a Cavision 4x4 mattebox in the classified section if you are interested. I am very satisfied with it, built very well, I just dont need it...

Chris

Chris, did you end up selling your cavision matte box? thx

yes, sorry, it has sold.

Follow Focus
 

Before even begining to think about following focus, you're going to need a manual lens with a witness marked, calibrated focus barrel that stops at both ends of the focus range. I have found it almost impossible to FF with any of the auto lenses as they are electronic as opposed to manual.

Chrosziel makes some very impressive camera accessories, not only for the prosumer market but for the professional market as well.

Stay Sharp..RB