I don't know when it was first introduced, or under what brand name. As
for the differences, the Pentax version has SMC, which makes it a slightly
better lens. The Vivitar version cames with an adaptor to go down to 1:1
(the Pentax does not, it can only go to 1:2). Another difference is the
Vivitar offers both a MF and AF version, Pentax only offers an AF version.
Todd
At 02:43 PM 1/31/01 -0500, you wrote:
>Greeting! When was Pentax 100 mm f3.5 macro was introduced in USA? What is
the difference between this lens & Vivitar 100 mm f3.5 mmacro? Does it
have any special lens coating? According to Practical Photography of UK
both are made by Cosina. With thanks.
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