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

Started Jan 18, 2013 | Discussions thread
biza43 Forum Pro • Posts: 15,074
Re: Inner fungal bloom issue, 6 month old Canon ef 70-300 L

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.

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Fujifilm X-T3 Fujifilm X-T4 Fujifilm XF 16mm F1.4 R WR Fujifilm XF 70-300 F4-5.6 R LM OIS WR Fujifilm XF 33mm F1.4 R LM WR +1 more
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