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Mongo is sorry to hear your news Bill. Mongo does not own one of these but would if had canon gear – it is an impressive lens. Whatever happens – do NOT throw it away !!!
Couple of points:-
1. Cannot believe canon has no knowledge of this fault – too many have occurred (and no doubt Canon has fixed at least some, if not most of them under warranty or otherwise).
2. This seems reasonably strongly to Mongo to be a design fault. In an upper end lens which is designed for serious commercial use, its life expectancy should be considerably longer than has been the case with many of these lenses from what Mongo is hearing. A reasonable case to argue that the lens is not fit for the purpose. There appears to be quite a bit of evidence about the same fault in reasonably newish lenses – and that is just the members we know about . Imagine how many more there are we do not know about with the same problem
3. Whilst Canon deny knowledge of these faults, you might find that by lodging a consumer claim in the appropriate Tribunal and then issuing a summons on Canon to produce certain documents (relating to the repair of these lenses) , they might get nervous and maybe reach an agreement with you in conciliation beforehand rather than have any dirty laundry which may exist, exposed.
Just some thoughts – but what would Mongo know ? After all, you can’t eat it – Mongo has tried.
Hope the outcome is good for you in any event.
PS MOngo has from time to time opened many a lens or camera to repair or modify it for a friend and for himself. So, if all else is lost, you have nothing to lose by trying this.- Seriously
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