Question about Sigma AF 70-300mm f/4.0-5.6 DL Macro Super Lens for Canon-EOS

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Friction in zoom, Sigma AF 70-300mm for Canon-EOS

Hi, I have friction in the zoom system in the lens. When I want to go towards 300mm I need to point down with the camera to let gravity help moving the lens. When I want to move towards 70mm I have to point up.
I would like to open the lens and lubricant the zoom mechanics.
Can any one suggest disassembly instructions for the lens?
What is recommended as lubricant agent?
Thanks,
Haim.

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Its more like a distorted inner zoom barrel or sand and dirt inside  the inner barrel will need to be replaced or you need to dismantle and clean out 

Posted on Apr 26, 2009

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