How to use a vintage Argus Tele Sandmar 100mm f4.5 on a Nikon or M4/3 Camera?
I think it's an Argus C3 mount. Made for an American rangefinder camera of the 1940s to 60s - https://en.wikipedia.org/wiki/Argus_C3 . It's not one that is too common outside the US, so don't know of any readily available adapters that will fit. You might find something on Ebay (some people 3-d print their own adapters and sell them). Hope this helps. Chris
