This Vivitar zoom is a versatile piece of "third-party" glass from the peak of the manual-focus era. Vivitar was famous for its "Series 1" line, but their standard zooms, like this 28-85mm, were also very popular for offering wide-to-portrait coverage in a single lens. This model features a Macro Focusing mode, allowing for close-up shots of small subjects. It is a "multi-coated" (MC) lens, which helps reduce flare and maintain contrast when shooting in bright light.