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Help 100-400 condensation

Discussion

6 replies
Posted by Ian Hay on May 7, 2009 at 3:17 AM
Help

Got court out in heavey sleet this morning(I thought this was suposed to be May) and have stupidly managed to get condesation into my 100 400 canon lens.

Any suggestions how to get it out, an old post on another forum suggested pumping the canera like a byccle pump, has anyone tried this.

Any sujestions greatfully received

Ian Hay
Posted by Mark Sisson on May 7, 2009 at 3:27 AM
Not had the problem with a 100-400 but whenever it's happened to my 500mm I've found an overnight sat somewhere warm (near a radiator but not on it for instance) has always done the trick.

Hope this helps.

Mark
Posted by F.DESMETTE on May 7, 2009 at 3:28 AM
Hi Ian
I drop 70-200 in water (Totaly immerse for 2 second!!), and it was with water inside. I have removed the little plate on the side of the lense (Where you can find the stabiliser,aotofocus,etc...)(Easy to removed) and place it on the dashboard of my car for a day, (I suppose that another heat source would do the job, radiator would work) while driving. At the end of the day I was photographing great snipe with that lense and it was working perfectly. I never had any trouble with it since....
Good luck
Frederic
Posted by Cheryl Surry on May 7, 2009 at 3:30 AM
Normally I have only seen condensation on the outer element, and the cure has been as Mark said.

I would leave it for 24-48 hours and if that does not get it sorted then you'll need to get it checked out by the likes of Lehmanns.
Posted by David Sewell on May 7, 2009 at 4:09 AM
Hi Ian,

I have had this problem with various lenses in the past. I would echo what Mark and Cheryl have said. Leave it in a warm, dry atmosphere for up to a couple of days. On the radiator will dry it faster, but the danger is that you get drying marks on the glass surface. If that does not work, then as Cheryl says you need a reputable repairer to dismantle, dry and clean it.

David
Posted by Ian Hay on May 7, 2009 at 1:05 PM
Thanks

I took your advice and the problem was sorted in about 6 hours, I also regularly opened the len to the 400mm setting and wipe the bottom of the barrel removing quite a bit of water that way.

Again thank cos this had me worried

Ian Hay
Posted by Danielle Nichol on May 8, 2009 at 3:16 AM
The airing cuboard works well.

:cool: