On Sat, 29 May 2004 21:20:19 -0400, Ken Lin wrote: > >> >> I have a few years old 100-400mm 4.5-5.6 L IS. S/N 212XXX. >> I use it every week and it has served me quite well for the past 3 years. >> Now the auto-focus seems to be searching a bit. Not coarsely, It >> looks fine >> throught the finder but just enough to lose the sharp images I >> was used to. >> When I try to go to manual focus the ring is exceedingly stiff. If I shut >> the camera off, remove the lens and excercise the adjusting ring, >> it usually >> loosens up after a few brisk turns and some coarse language. >> The IS always works great, except when I forget to turn it on... >> The lens has never been dropped or damaged. It's very clean and >> well cared >> for. > >Also had this happen to my EF100-400 two years ago, Canon Canada fixed free >of charge, didn't note what the problem was on the repair sheet. > >Ken >
My 3 year old 100-400 has recently developed some AF problems as well (the same searching problem). It's especially noticable if I'm following a moving target (such as a bird in flight). Was your lens still under warranty? Rob * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
