Hi guys. I'm new to anamorphic & would like to ask for your opinion about an Isco Ultrastar light gold (1st version) that I'm buying. According to the buyer, the focus ring does not turn & is fixed this way. It is set to infinity. Is there a version of this lens that is locked? Is this normal? Also, the rear end of the lens body has metal indentations due to the screw of the clamp digging in to the metal. If that is the case, is this something that will stop you from buying the lens. I'd really appreciate your thoughts on this. Thank you.