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Optically a capable performer, has good sharpness, the short minimum focus distance (20cm or 8 inch) is slightly better than the Canon FD 20 f2.8 and allows for interesting semi-closeup effects. Colors usually come out flatter than with the Canon FD 20 f2.8, the smaller maximum aperture is also more limiting and the Vivitar lens cannot cover a truly hyperfocal depth of field. Build quality feels light and cheap, although not to the point that the control rings on my specimen have gone wobbly or look like in danger of falling apart.