Hey everyone, i'm looking for the name of the accessory for the lens that professional film uses for their lens. Its a little knob that they use to turn which in turns control manual focus of the lens w/o holding the lens itself. Does anyone know what i'm talking about. check out this picture from ebay

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7559648699&indexURL=1&photoDisplayType=2#ebayphotohosting

It's called "follow focus". They can be quite expensive, and there's some threads floating around about making them yourself (maybe in the alternative imaging methods thread).

thanks Justin, i will look into that.