Am Mo Oktober 27 2003 00:57 schrieb ka3hsw@earthlink.net:
> On 26 Oct 2003 at 15:25, Bill Turner wrote:
> > It always amazes me that the sun, which is just a ball of gas, has
> > such sharp edges.
> > Do I need to get out more often? :-)
>
> I believe that it is typically photographed with a mask, to eliminate the
> corona from the picture, and also to minimize flare light in the
> photograph.
No, this is how the sun appears in such a telescope. Of course a filter is
used, but only for attenuation. The corona is invisible because the disc is
much brighter than the corona.
Nice pictures, anyway.
73,
Ekki, DF4OR
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