Hi everyone i bought a second hand one 40mm DX Micro. there is small crack on the plastic focus window which the seller said he was simply tripped over the camera bag and lens was inside. Did few check everything looks fine. only one thing im not sure is the focus ring, when you turn to infinity it stops but if you keep turn the ring it will move free (same when you turn other side) is it normal?? thank you for help.
And is anything else i need to check? there is no dent or any sign of lens been dropped, thank you!
.

And is anything else i need to check? there is no dent or any sign of lens been dropped, thank you!
.

