A used Vivitar Series 1 70-210mm f/3.5 macro focusing lens in a Konica A/R mount. Lens shows a bit of haze and a fair amount of visible fungus on its inside glass elements. The aperture blades are clean and work smoothly. The zoom and focus collar is smooth for focusing but somewhat stiff when zooming (which was normal for this lens). A unique 1:2 close-up function made this one of the best-selling lens in the days when this lens was being heavily sold (1970's-1980's).