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Old Oct 13, 2006, 8:14 AM   #1
TDN
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I came across this one while looking for an A lens, thought some of you might find it interesting

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160035618405
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Old Oct 13, 2006, 2:00 PM   #2
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TDN wrote:
Quote:
I came across this one while looking for an A lens, thought some of you might find it interesting

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160035618405
[align=left]How did Vivitar provide such optimal sharpness with a zoom lens in the late 1970's that still holds up to the professional standards of today? The answer lay in abandoning true zoom action, and substituting a vari-focal zoom. With a vari-focal zoom, one refocuses the lens each time one changes the focal length. This trick allowed the optical designer to maximise the sharpness and quality of the lens.[/align]

[align=left][/align]

[align=left]This is why this lens may not be everyone's first choice today. It is a very highly regarded lens however.[/align]

[align=left]Ira[/align]
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Old Oct 13, 2006, 9:22 PM   #3
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I believe the seller lifted that quote from the third party cult classics website.

Tim
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