Nikon mount zoom Sigma 28-70mm F3.5 lens objektiv + M52 Hama filter BAD ? FOCUS

Description: This zoom lens for Nikon mount. Included both rigid thread-in caps and protecting filter.

Issues: it may show some usage marks in body and some inner dust as 99% of used lens show.  Focus ring is sticky to the touch. It won't reach focus with Samsung NX adapter (on Samsung NX camera) or on Nikon camera. Only macro focus available, so I guess there is something wrong...