According to at least one person who has seen the scope up close, there is a
corrector lens mounted in the baflle tube.
-John

>
>On Tue, 17 Feb 2004, Tom Wideman wrote:
>
> > Rod et al,
> >
> > Exactly what IS a DK? Is the corrective element the secondary itself,
> > or is there a corrector plate, or what? How does it differ from an
> > SCT?
>
>It is a Cassergrain configuration with an elliptical primary and a
>spherical secondary. It normally suffers from important coma - and for
>photographic applications needs a coma corrector (usually a lens system
>near the focal plane).
>
>Radu
>

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