I bought this som berthiot 20mm f1.9 lens assuming it was a c-mount but it is much smaller with an elongated screw mount. Can't figure out what type of mount this could be. Here it is compared to ...
So I have an Albinar ADG 28-80mm lens, that I have acquired, and I was wondering what mount adapter would be required for it to work on either the Canon EOS Rebel T1i or T5, I have both. Thanks!