Originally Posted by exe163
While we are at it, there's one more thing. The rear most glass is ~1.5cm from the mount. Normal?
This is how it was designed. Perfectly normal.
As for the aperture ring, my ring moves quite lightly but clicks decisively into each half-stop. It does over run slightly, which is normal.
I'm not sure what you mean by "up and down". Is that front and back? I would not worry about a little play as long as everything functions correctly, as long as it is not excessive.