> Michael Fontana wrote:
> I received a 135mm f/2 L USM today. Is it unusual for
> filters to be
> extremely difficult to screw in and to squeek a lot? It's
> like the threads
> are damaged. This happened with every filter I tried. My
> other lenses
> take filters easily. Also, my lens seems to not want to lock
> focus. It
> hunts a lot. The 70-200mm f/2.8 did fine in the same
> conditions. Could
> the lens have suffered some type of impact damage? I'm
> already scheduled
> to return the lens. Thanks.
---------------------------------------------------------------
Hi Michael.
Could be dirt in the filter threads as well. TRry cleaning
the threads
with an alcohol soaked Qtip. Then if you are still getting
the squeak,
try rubbing a small candle (b-day candle) on the threads of
the lens and
screw in and remove filters several times. I do this with stubborn
filters and especially hard to put on hoods both bayonet and threaded.
Peter K
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