On Saturday, October 06, 2001 at 8:34, Gary Edwards <olympus@xxxxxxxxxxxxxxx>
wrote on "Re: [OM] Unlikely uses for 1.4x," saying..
> ----- Original Message -----
> From: "John Prosper" <japrosper@xxxxxxxxxxx>
> >
> > In order to employ the 1.4x TC with a lens not designed to
> > accommodate it, at the very least one needs to insert the 14mm
> > extension tube between the lens and the TC. The 7mm tube is not
> > deep enough to prevent the 1.4x TC from banging against the lens'
> > rear element.
>
> John may be referring to Zuikos, but with third party lenses, it
> depends. The 7 mm extension provides enough spacing for my Sigma
> 400/5.6 APO and an OM 1.4X-A.
>
> By the way - why do we call them third party lenses? Who is the
> second party? ;-)
3rd party lenses - others make the lenses
2nd party lenses - Olympus makes the lenses
1st party lenses - you make the lenses.
Tom
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