I'm afraid this is a post of the "I just got a C-mount lens and it don't fit the adapter" variety. Do any of you C-mount fetishists have any experience of this version of the Computar 12.5mm f/1.3? It seems to be, dare I say it, rather larger than those I've seen on this forum. Either way, the base is too wide for the Metabones adapter I have, so it looks like metal will need to be removed. After detaching the two little finger lugs from the adapter, I can get about two turns on the C-mount thread before the base of the lens base fouls on the adapter. Are there any relevant "how-to" links that anyone would care to share? Many thanks in advance!