A standard kit lens from the Fujica ST series of SLR cameras. The ST series of cameras used the M42 lens mount. This lens seems really well made, all metal.
These shots were taken on a Fujifilm X-E1 digital mirrorless camera. The sky was grey, so colors were muted. I pushed them up a little in Lightroom. But overall, the lens has a nice contrast, and it’s easy to get a good manual focus.
These are all wide open, unless noted.
Comparison with above, below is f5.6
Wide open on the left, f5.6 on the right.