On Mon, May 07, 2001 at 07:54:03PM +0000, John A. Lind wrote:
> At 00:02 5/8/01, Joel Wilcox wrote:
>
> >Wow. Thanks.
>
> You're welcome. Researched some of this stuff for a tutorial on my web
> site about lenses. Not yet complete, but getting there.
Hmm, seems we`re working on the same subject.
>
> Thinking out loud:
> I ought to put together a table showing what the various combinations tube
> lengths do with various Zuiko prime lenses; both with Oly tubes and the
> Vivitar. Found the longest tube out of the Vivitar set, the 36mm, quite
> handy with the longer lenses. Wouldn't be hard to do in a
> spreadsheet. Results would be approximate measuring from lens exterior as
> the theoretical formulae are based on distances from lens principal points
> (nodes) and film plane. Might be useful for some as the TOPE 6 window is
> still open (have you done yours yet?).
I`ve made such a spread (but not with Excel!), as Ive had the same idea.
I`ve converted the first results to html. So far For the 50mm /F1.8 and the
85mm /F2.
Results at::
http://studweb.studserv.uni-stuttgart.de/studweb/users/mas/mas12462/Optik/Makro/Frieders_OM_Makro.html
or follow the link "overview macro-photographie mit with Zuiko-lenses" my site
at:
http://studweb.studserv.uni-stuttgart.de/studweb/users/mas/mas12462
regards,
Frieder Faig
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