I've had mine about 5 years now, and not a vestige of a problem.

--
Skip Middleton
http://www.shadowcatcherimagery.com

"AW" wrote in message ...
I've been using mine for 10 years now (1.8 Mk II) and never had a failure/
problem.

The mount looks like new.

I think if you handle your gear well, it does not matter if its
polycarbonate or metal!

Only the result counts, and this lens is capable of very good ones.