Sigma 30mm EX DN partial disassembly and lubrication (Images)

Started Dec 11, 2012 | Discussions thread
swixtwix
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Re: Sigma 30mm EX DN partial disassembly and lubrication (Images)
In reply to flint-hill, Jan 22, 2013

Sorry to pull up an old thread.

The Sigma 30mm focus ring was "stuck" on a recent trip to Thailand.  To unbind, I had to grip it pretty tightly and turn.  Not good for critical focus.

Thinking about using the tutorial to disassemble and lubricate the focus ring... I have a feeling it has something to do with the focus ring itself sticking to the barrel of the lens.  How is this mod holding up after a few months of use, specifically the lubricant?

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