It's not a "close-up" lens. Its an optically matched extender. (As opposed to
an extension tube with no optics like the competing Tamron supplies.)
The Vivitar version has a tripod socket on it.
Larry
lamadoo@xxxxxxxx wrote:
> "90mm f/2.5 Macro Series 1 M: Macro reproduction is 1:2, but it was suppled
> with a closeup lens which brought it to 1:1.
> Reference:
> http://cyberdenis.topcities.com/vivitar.htm
>
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