Steve Onderick

Hello everybody. I'm new here, but it seems possible that somebody around here might have some suggestions for me based on my peculiar predicament with a nice old Angenieux zoom that I'd like to get up and running. I've been sitting on an Angenieux 15-150mm lens for a few years now. It was advertised as an Arri Standard mount when I bought it from ebay, but in fact it's something else that looks similar to Arri Standard. I'm still not certain exactly what this mount is. At some point I reached out to a Russian guy on ebay and he suggested that it might be an old Italian mount called "Cinefon 16." In any event, there's almost no mention of Cinefon 16 to be found online, so I've been looking into whether a friend who works at a machine shop might be able to machine me a custom adapter. Most of the necessary measurements are no problem (I've got access to a caliper and a micrometer), but I'm trying to figure out if there's a way I can crack the flange focal distance (the necessary distance from the mounting ring to the sensor). I filed down the inside of an Arri Standard Mount adapter slightly in order to fit this mount into it in hopes that I could simply shift the lens back and forth until everything was correct with the focus and the parfocal zoom, but it's looking like the lens probably has to be closer to the sensor than this filed down arri standard mount will get it (that said, when I move the lens closer to the sensor past a certain point, I lose the ability to focus to infinity, so frankly I'm a bit confused about what's going on). I guess the other option would be to remove the mysterious mount and see if there's some way to connect directly to whatever the mount is mounted to, but it looks like i need some kind of spanner wrench to remove the mount. Anybody have any ideas? Looks like images have to be pretty small to be uploaded here, but this google photos link has some high quality images of what I'm working with.