You don't say whether your lens was new. I had similar trouble (focus lock) with a s/h EF200 f2.8L I bought a few years ago. I think it was due to poor electrical contacts, because after being taken on and off the camera a few times, the trouble ceased. I've used minute amounts of lock smith's graphite to cure problems with filters, lens-hoods etc.
M Stewart Milton Keynes, UK ----- Original Message ----- From: Michael Fontana <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 15, 2001 2:08 AM Subject: EOS 135mm f/2 L USM Problem > 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. > > Michael * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
