Unwanted Lens Movement from Follow Focus

[teayce]

The equipment I am using is as follows...

5dmkII
Zeiss ZE 85mm 1.4 Lens with Zacuto ZipGear
Chrosizel DV Follow Focus

... when I focus, the torque of focusing the lens with the follow focus appears to either pull down or push up on the lens creating a vertical up-and-down movement in the frame.

I have pushed the follow focus gear tight to the lens gear and left a little space between the teeth to see if that helps - neither scenario changes the movement.

Am I missing something? This movement does not occur when I simply use my hand to focus the lens. I have used old Nikon lenses on a 35mm adapter without this issue, but these Zeiss ZE lenses are really stiff - more like a real cinema lens.

Anybody have any suggestions to eliminate this unwanted movement?

Thank you.

Troy

 

[natxbrotha]

If your lens is shifting when you use your follow focus then it sounds like the lens mount is at fault... the stiff focusing on the Zeiss lenses doesn't help either. I have an old Nikon 85mm that is the same way.

 

[Postmaster]

I always "pre torque" when pulling focus - PITA but it helps.

Frank

 

[ecking]

Your gears may also be meshing too tightly.

 

[Chris Santucci]

Actually, the whole camera might be reacting, not just the lens. Check the camera mounting setup.

.

 

[marco0782]

If the lens is long enough, you can use a lens support under the lens to hold it firmly in place. I find that this helps.


Marco