devon.birder
Well-known member
I recently bought the above lens on Ebay for use on my 40D and I am beginning to wonder if the IS actually works. I was with a friend of mine a few days ago and he was using a Canon IS lens and I asked him how he could tell. He turned the IS on and I could hear it working which I can't with mine. I wondered therefore if anyone has this lens that could advise me how I can tell if my IS is working. Thanks.