> usher99@xxxxxxx wrote:
>
> Must measure with Big Foot at 1:1 as it uses a combo of
> standard
> extension and floating elements--down side of straight extension is
> loss of light of course.
> Mike
>
>From my understanding the light loss is directly related to magnification, so
>whether that 1:1 is achived by changing focal length, lens extension or a bit
>of each is irrelevant.
...Wayne
Wayne Harridge
http://lrh.structuregraphs.com
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