Vivitar 28-70mm f/3.5-4.8 MC Auto Focus Zoom

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The Vivitar 28-70mm f/3.5-4.8 MC Auto Focus Zoom was marketed by Vivitar in the late 1980s.

Contents

Description

The Vivitar 28-70mm f/3.5-4.8 MC Auto Focus Zoom was one of two auto focus zoom lenses marketed by Vivitar to retrofit conventional, non-autofocus cameras. The lenses were available in a variety of fixed camera mounts. The autofocus system was powered by batteries in the lens and had supported autofocus modes: one for stationary subjects and one for continuous tracking of moving subjects. The lenses used a Honeywell Corporation TCL detector (an early phase detection sensor) to determine focus. [1]

Popular Science reviewed Vivitar's two auto focus lenses in the July 1988 issue and this to say:

I found that focusing is faster with these lenses than with a conventional manual-focus zoom. The resulting photos were satisfactory for snapshots but might not satisfy a demanding professional.[2]

Specifications

  • Badging: Vivitar
  • Manufacturer: unknown
  • Manufacture Date: ca 1988
  • Focal Length: 28-70mm
  • Aperture Range: f/3.5 - f/22
  • Diaphragm Type: Automatic
  • Diaphragm Blades: 8
  • Filter Diameter: 52mm
  • Minimum Focus: Normal: 1m (3.28 feet), Macro: 0.35m (13.8 inches)
  • Mounts: Canon FD, M42, Minolta, Nikon, Olympus OM, Pentax K, others
  • Elements: 8
  • Groups: 8
  • Weight: 395g (13.9 oz)
  • Accessories: unknown
  • Example Serial Numbers: unknown
  • Original Stock Number(s): unknown




References

  1. Vivitar ad for Autofocus zoom lens family, April 1988 issue, Popular Science
  2. Converting to Autofocus, July 1988, Popular Science

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