Vivitar's 1980s push-pull superzoom — 28-200mm f/3.5-5.3 in Olympus OM fit.
The Vivitar 28-200mm f/3.5-5.3 is a manual-focus superzoom made by Kobori and sold under the Vivitar name in the 1980s, this example in Olympus OM fitting. It packed a wide-to-telephoto range into a single lens for travel and general shooting at a time when such zoom ratios were still unusual.
Its ambitious formula uses eighteen elements in sixteen groups. The lens weighs around 640g and takes 72mm filters, with a macro focusing mode at the short end and a six-blade diaphragm. Zoom and focus share a single push-pull, rotate-to-focus trombone barrel rather than separate one-touch rings for each.
The all-in-one range was its selling point, covering wide-angle to short telephoto without a lens change, unusual for the era. Optical compromises appear as softness and flare wide open, but the metal build and characterful rendering appeal to manual-focus film and adapted-mirrorless users.
Used prices are low; check the trombone barrel for zoom creep and slack, inspect the many elements for the haze and separation common to complex vintage zooms, and confirm the aperture ring clicks cleanly. OM copies adapt readily to mirrorless bodies via inexpensive adapters.