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

Started Jan 18, 2013 | Discussions thread
OP sanderspics New Member • Posts: 8
Re: Inner fungal bloom issue, 6 month old Canon ef 70-300 L

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.

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