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-   -   manual zoom lens motor attachment? (https://www.dvinfo.net/forum/open-dv-discussion/499712-manual-zoom-lens-motor-attachment.html)

Robert Bobson August 17th, 2011 12:49 PM

manual zoom lens motor attachment?
 
I've been searching for this but haven't found anything:
aren't there external variable speed motors that can be mounted side by side with a lens in order to convert a manual zoom into a powered zoom? I don't know what they're called ~

any reference is appreciated!

Brian Drysdale August 17th, 2011 01:22 PM

Re: manual zoom lens motor attachment?
 
There are a number of makes including Heden, Preston and Arri, but a zoom servo motor or zoom motor would cover what you're describing. These are now digital motors that are controlled by a separate control used by either the camera operator or the 1st camera assistant.

Preston Cinema Systems
HEDN Engineering
ARRI Group: Controlled Lens Motor CLM-3

Robert Bobson August 17th, 2011 04:36 PM

Re: manual zoom lens motor attachment?
 
thanks for the info. are there also attachments that can help make the manual zoom smoother? I'm thinking like a geared crank that would take several revolutions to zoom the lens just a small bit?

Brian Drysdale August 17th, 2011 04:57 PM

Re: manual zoom lens motor attachment?
 
You can get a fluid drive for zoom lenses. these are made by Chrosziel and work extremely well. Some of the old 1960s & 70s Angenieux zoom lenses had a zoom crank fitted, although I found these devices rather underwhelming to use on the couple of occasions I came across them.


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