Re: [APML] Rising Emu

["Volker Wendel" <volker@spiegelteam.de>]

Thanks for the information, Matt, I will try this out before my trip! You
will see how I will have solved in practice <g>!

Volker
www.spiegelteam.de




> At 04:59 PM 5/20/2002, Axel Mellinger wrote:
> > > Another question (because I´m in Namibia in July too): how do you plan
such
> > > mosaic shots? Do you look for the center of the area for every shot
and how
> > > much do you overlap the frames?
> >
> >In the text below the mosaic, there is a hyperlink titled "4-frame
mosaic"
> >that will open a little JPEG file with the four raw images. As you can
> >see, I try to get about 20% overlap. Sometimes this is not trivial to
> >achieve, especially in areas with few bright stars (when it is hard to
see
> >anything at all in the viewfinder). It is always a good idea to sketch
the
> >frames in a star chart, especially when your exposures are several nights
> >apart.
>
> Volker,
>
> It helps if you can compose each shot with the frame edge aligned exactly
> north/south. This aligns the frames. If they are askew you have to crop
more.
>
> In Axel's Emu mosaic, he did not compose north/south. He aligned the edges
> according to the galactic equator. But he had lots of bright stars to
align
> with.
>
> If you make printed charts with TheSky, it makes it relatively easy to
> compose. It's important to have a viewfinder in which you can actually see
> 5th or 6th mag stars near the edge of field.
> --
> Matt BenDaniel
> matt@starmatt.com
> http://starmatt.com
>
>
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