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Preston DM4 Motor Torque / Speed ?

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#1 Walter F. Rodriguez

Walter F. Rodriguez

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Posted 22 November 2011 - 02:43 PM

Has anyone used the Preston DM4 Motor for pulling focus?

Is it good enough for modern lenses?
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#2 Alan Mehlbrech

Alan Mehlbrech

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Posted 23 November 2011 - 07:51 AM


I just did a test and it is not a focus motor. It was slow getting to the mark -BUT it is a wonderfully light iris motor.

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#3 Lawrence Karman

Lawrence Karman

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Posted 24 November 2011 - 01:27 AM

Not enough torque for focus.
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