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

Started Jan 18, 2013 | Discussions thread
Steve Balcombe Forum Pro • Posts: 15,582
Re: Inner fungal bloom issue, 6 month old Canon ef 70-300 L
1

sanderspics wrote:

Steve Balcombe wrote:

The 70-300L is weatherproof, but not fully waterproof and certainly not airtight. Also it's only weatherproof when mounted on a body - the rear is completely open. If you're working in a very humid environment you need to take appropriate precautions, even with a weatherproof lens.

Thanks, but such as what? I have a filter and lens cap attached all the time, the lens cap only coming off when taking a pic, and the lens is either attached to the camera body or has the appropriate cap on the mount and kept in a bag.That should be adequate, especially for a pro lens. My efs 10-22 and crappy early 18-55 (non IS) don't have any such blooms, and the 18-55 doesn't even have a filter attached.

I'm sorry, but the L series lens should not have this affliction.

And I'm genuinely sorry to be the bearer of bad tidings, but did you not actually understand my reply? Both the humidity and the fungal spores are carried in the air. To keep that level of humidity out of a piece of equipment for months on end it would need to be airtight.

I've never been fortunate enough to travel in that area, but people who live and work there go to great lengths to avoid this problem - even buying special cabinets to keep their gear in.

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