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Inner fungal bloom issue, 6 month old Canon ef 70-300 L

Started Jan 18, 2013 | Discussions thread
Telhma Regular Member • Posts: 391
Re: Inner fungal bloom issue, 6 month old Canon ef 70-300 L

biza43 wrote:

As Steve said, this happens in humid and hot climates. The lens is not airtight, and the zooming in-out actions will suck air inside the lens.

My sample of the lens has now gathered some dust inside the barrel from precisely this reason. With time, zoom lenses will gather "stuff" inside, because they are not airtight. In such climates as SE Asia, you have to invest in special cabinets to store your gear.

what do such cabinets? i think when you store your lens in such things you are not realy zooming it in and out all the time, so when you take it out the cabinet to use you still have the same problem, or am i wrong?

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