Is it normal to have a tiny bit of movement at the mount of a 50D or other body? I was shooting a basketball game last night with my 70-200 2.8 IS and noticed a bit of wiggle room at the lens mount atttachment. Not much but you can move it probably 1/2 or 1 mm. a little wiggle room there. Is this normal? Its only when you try to twist the lens without pushing the release button. a little click-click-click is the best way i can explain it. I then put the 17-40 on and its the same thing. What do you think?