The Vivitar 35-105mm f/3.2-4 was one of the brand's short-telephoto standard zooms from the 1980s, giving SLR owners a wide-normal-to-portrait range in a single lens. It was marketed as a practical everyday alternative to carrying separate 35mm and 105mm primes.
It is a manual-focus zoom with a variable maximum aperture from f/3.2 at the wide end to f/4 at the long end, fitted with an automatic diaphragm for open-aperture metering. Vivitar built the optical formula across a range of interchangeable SLR mounts to suit different camera systems.
Its comparatively fast aperture for a 1980s standard zoom helps in moderate low light and gives usable subject separation at 105mm for portrait framing, though resolution softens toward the edges at maximum aperture. It performs best as a general-purpose, walk-around optic rather than a specialist lens.
Secondhand copies are reasonably plentiful and affordably priced. Check the zoom action for smooth, even travel without grinding, confirm the diaphragm blades are free of oil, and verify the specific lens mount fitted, since Vivitar issued this formula across several SLR mount options.