----- 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? ;-)
Gary Edwards
people, places, flight at http://members.home.com/garyetx/
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