Question about construction of Sigma 30mm and lubrication

Started Dec 8, 2012 | Discussions thread
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cwood
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Question about construction of Sigma 30mm and lubrication
Dec 8, 2012

I have seen threads on taking apart the lens to get at the inside of the focus ring.  No way I am going to try that as it seems quite involved.  That said, I was thinking of using a few drops of a silicone lube on the external joints and seeing if it will migrate into the mating surfaces while turning it.

Question is whether the lens is sealed and I don't risk the silicone migrating to lens or aperture surfaces?

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