It focuses smooth as butter after over 30 years of use.
And it is one of the sharpest lens I ever used. Period.
Unfortunately it will mount, because of the short focal plane/flange distance, only on the Minolta manual cameras, or, with an adapter, on the Olympus digitals.
I’ve adapted it on a M42/Canon Eos ring with focus confirmation chip, but is a gimmick even if it works like a charm.
To mount this no-rare jewel on a Nikon or Canon camera you will need an adapter ring with an optic element inside, that almost certainly will degrade the unbelievable superb sharpness exhibited by the lens alone.
Rating: 
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