I have the first version of the Asahi Super-Takumar 50mm f/1.4,
which was manufactured between 1964 to 1966. This is the
oldest lens I own, but it is in beautiful condition.
I can mount it on my Nikon Z6 for a normal field of view,
or on my Fuji X-T2 or X-T5 for a 75mm full frame equivalent.