It is like using an astronomical telescope without a finder scope.
Large gain but the field of view is very restricted, thus making it
hard to get your subject in focus. The diameter is about 4 ft.
Greg Kunkel
--- Dave J <> wrote:
> --- In Gregory Kunkel
> <> wrote:
> > Phil
> > I found some space. Here is the link.
> >
> http://www.catskill.net/gkunk/parabola/cardboard.htm
>
> Interesting. What sort of results do you get with a parabola like
> this? What is the actual diameter?
>
>
>
>
>
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