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ef 300mm f2.8 L non-IS internal gunk! cleaning internal elements

Started Aug 4, 2014 | Questions thread
bronxbombers4 Veteran Member • Posts: 3,387
Re: ef 300mm f2.8 L non-IS internal gunk! cleaning internal elements

yikes! hope that is not mold! or some sort of coating failure.

it seems very strange to get dirt like that....

Roger at Len's Rentals might know

it can be tricky to take apart, alignment has to be perfect when you put it all back

even though canon no longer has parts, they can probably do cleanings still, but if it is fungus they won't and if it is an element gone bad they don't have more (maybe you could find a broken one cheap on ebay and get the part from that and then have them replace it, if need be)

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