I've just received my second Iscorama Cinegon. The first Cinegon I have I noticed when I rotate the focus ring below 2m it will just fall apart. This doesn't happen to the original Iscorama I have. I thought it was the fault of my Cinegon at the time since its condition was so bad.
When I got another Cinegon it's just exactly the same as the first one. It's like you're screwing the front glass out.
So, is it normal for the Cinegon version?