Re: [APML] Q/Spectra Sure Sharp

[AikeM.Voelker-Jamin@t-online.de (AikeM.Voelker)]

Hi Steve,

thanks for your answer! Due to very bad weather over here in Germany I would 
really enjoy reading some "fundamential" things about the ronchi basics. This 
would help me a lot. If you have some time I would appreciate receiving a 
scanned copy!

I also looked at the URL you've suggested to look at, but somehow I am lost - it 
says regarding Nikon:

Camera System           Mount type                       Register
Nikon                   bayonet                          46.50

Can you give me a hint what these figures should tell me?

Thanks again and best wishes for you, too

Clear Skies,

Aike 
www.astrophotoghraphy.de


steve banbury schrieb:
>
> Hi Aike--I can scan the one sheet 'manual' which basically only tells you how
>  to
> intrepret a ronchi grating, and e-mail it to you. For focuser screen distance
>  and
> film distance , you can get the value from the following website, and then
>  measure
> it with a micrometer: http://www.a1.nl/phomepag/markerink/mounts.htm
>
> Let me know if you'd like the scanned "manual".
>
> Best wishes--Steve
>
> "AikeM.Voelker" wrote:
>
> > Hi List,
> >
> > I've purchased a used Spectra Sure Sharp focuser yesterday and I am trying
>  to
> > get some more information or a manual about it.
> > As far as I know Spectra doesn't exsist any longer so I guess I can't get
>  any
> > clues from them!
> >
> > I plan to use the Sure Sharp in connection with my GEG and a Nikon F3 HP
>  Camera,
> > the only thing I know about the focuser is that it's the "Nikon" version.
> > The focuser screen seems to take place at the same distance to the scope
>  where
> > later during exposure the film is located. How can I judge that distance of
>  the
> > focusers screen and the distance of the camera (film) is the same?
> >
> > Thanks for all hints and Clear Skies,
> > Aike
> > http://www.astrophotography.de
> >
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