there is play in some mounts and lenses, the mount my be close to tolerance being too loose but and the lens might be close to being too loose as well, combine that and they will feel loose , don't worry it isn't really a problem and just take the normal precaution , nothing more. Or sell you lens annd get a different one
Thanks so much, John. I feel much better. I never really notice any softness or other errors. But when I felt the wobble, I got worried. My 12-24 and 80-200 are super-sharp, but could they be sharper? I thought to myself.
Is it normal to notice this only with large lenses? I just bought a Sigma 10-20 and I notice a slight angular movement (on the order of a mm or so) when I put on/pull off the lens hood.
The reason I ask is because I've never noticed this with wither my 50/1.8 or my 18-70 (kit)
Seriously though, the most noticeable is my 80-200 AFS, it feels fairly loose (rotation) but makes no difference, I just treat it with a tad more care.