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Condensation inside lens

Started 4 months ago | Discussions thread
OP fronko Regular Member • Posts: 493
Re: Condensation inside lens

Amadeus21 wrote:

As I already said: Store the lens outside in the coldness. (I think there is enough at the moment in U.S. : (

Cold air is *very* dry. So you may make the lens "breath" in and out but agitating the zoom and focus function every once in a while for some days ( I think not below - 15 deg. C.) during a drying cycle.

No lens is air tight. So I think the owner before has done somerhing inappropriate with the lens. Furthermore and worse, there might be moisture in a *group* of lenses, which are cemented together in the factory. Then you will have to send the whole lens to Sigma definitely. You can have a look at the specs and construction of that objective (how many lenses in how many groups) at the Sigma site. Then you may see whether the frontmost lens is part of a (cemented?) group.

So my opinion.

Best wishes

Johannes

store it outside where? the lens is the 20mm 1.4 art dg hsm.

this one

https://www.sigma-global.com/en/lenses/a015_20_14/

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