Hi solar observer,
in the near future is with us to watch the weather bad
. That's why I post here an old observation of 15 June 2011. The picture was taken with the newly configured Unigraph. The instrument is working well
, so I have enclosed the secondary system complete with red foam sheets. This looks good and protects the system from dust (one of my biggest enemies)
http://www.unigraph.de/images/Sonne2...15ana1_75p.jpg
http://www.unigraph.de/images/Instru..._gekapselt.jpg
It can be seen on the primary focal plane of the Unigraph a strong fan, which cools the cone pinhole aperture and the block
cs Harald
www.unigraph.de