Pdmovie might be within your price range for a wired motor and controller. No idea of reliability as I haven't used them.
Massively helped by great music
Windowing or selective colour values to protect or change.
Years ago I'm on a shoot in the hills of Scotland. I'm the 3rd AD and we have dug plague pits for a medieval burning of bodies and a church during which there's a monologue. We're shooting sync sound and the 1st Ad tells me there's a scrambler motorbike about a mile up the mountain that's destroying the sound recording. He tells me if I can convince him to stop and catch him...on foot! Well actually I do without a heart attack. The rider tells me it's lambing season and he needs to help them give birth. I tell him we have permission from the land owner/farmer and he agrees to stop. They lost three lambs that day. Talk about feeling guilty.
This is interesting to watch. The angles change slowly within the scene as the power between them shifts.
Psychologist Scene from Jonathon Sendall on Vimeo.
Great post. Some fascinating stuff in there.