Difference between revisions of "Vivitar 28-70mm f/3.5-4.8 MC Auto Focus Zoom"
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=Description= | =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.<ref>[http://books.google.com/books?id=zQAAAAAAMBAJ&lpg=RA1-PA44&dq=vivitar%20auto%20focus%20intitle%3Apopular%20intitle%3Ascience&pg=RA1-PA44#v=onepage&q=vivitar%20auto%20focus%20intitle:popular%20intitle:science&f=false Vivitar ad for Autofocus zoom lens family, April 1988 issue, Popular Science]</ref> | + | 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. <ref>[http://books.google.com/books?id=zQAAAAAAMBAJ&lpg=RA1-PA44&dq=vivitar%20auto%20focus%20intitle%3Apopular%20intitle%3Ascience&pg=RA1-PA44#v=onepage&q=vivitar%20auto%20focus%20intitle:popular%20intitle:science&f=false Vivitar ad for Autofocus zoom lens family, April 1988 issue, Popular Science]</ref> |
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| + | Popular Science reviewed Vivitar's two auto focus lenses in the July 1988 issue and this to say: | ||
| + | <blockquote> | ||
| + | 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.<ref>[http://books.google.com/books?id=R4zUHMZQudoC&lpg=PA41&dq=vivitar%20intitle%3Apopular%20intitle%3Ascience&pg=PA41#v=onepage&q=vivitar%20intitle:popular%20intitle:science&f=false Converting to Autofocus, July 1988, Popular Science]</ref> | ||
| + | </blockquote> | ||
=Specifications= | =Specifications= | ||
Revision as of 05:04, 8 September 2011
The Vivitar 28-70mm f/3.5-4.8 MC Auto Focus Zoom was marketed by Vivitar in the late 1980s.
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| Vivitar 28-70mm f/3.5-4.8 MC Auto Focus Zoom image by Just Plain Curt (Image rights) |
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
Photos
