----------------------------------- Cristian Monea 16 Iul 2009 11:58 ----------------------------------- Poti citi si aici: http://www.amateurastronomy.com/tools.html (in partea de jos a paginii) http://www.skyandtelescope.com/howto/diy/3306876.html (in partea de jos a paginii) http://www.skyandtelescope.com/howto/diy/3306991.html?c=y&page=1 http://sci.tech-archive.net/Archive/sci.astro.amateur/2008-01/msg00044.html http://www.larrydsmith.com/astro/collimation.html