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John Iver Berg

Remote Follow focus for use with 3D shoot

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Hi, We start shooting a 3d feature early next year, the plan is to use two Canon 5d on a mirrorig.

What would be the best solution for a remote follow focus on this setup? I've been in contact with BarTech Engineering, witch has a great follow focus, but i learned that i have to use digital motors, and BarTech is designed for analog motors, and isn't accurate enough.

 

quote from Jim Bartell

"The best potentiometers have a linearity

specification of 1%. This is not nearly enough to control two lenses precisely over

their range of travel. While two motors may match up there is no guarantee they

will. It has been tried and the results were unsatisfactory."

 

any suggestions of what remote followfocus to use?

 

John Iver Berg

Theon Productions

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