Originally posted by Ben78 I measured mine at 3.2mm 0.125" at 16mm. I wouldn't be complaining if I was getting 0.035!
I found that by clamping the lens to a table I was limiting the movement of the front element. But I can still only measure .065" by using somewhat more creative clamping. That doesn't sound like a lot, but is sufficient to see edge resolution issues on vertical images, at least with newer bodies. I didn't notice any degradation with my K100, but whether that was due to the lens not having as much wobble back then, or just the lower resolution sensor, I don't know. I really don't think my lens has deteriorated from (moderate) use, but since the change would have been gradual, it's hard to know for sure.
I'm still curious if anyone has had their lens serviced and can report to what degree it was possible to decrease the wobble.