I have had an interest in Spectroscopy for many years and even went so far as to build a grating spectrograph for my telescope. It was in the early days of CCD's and all I had was a linear CCD. The alignment proved to be almost impossible so I abandoned the project. The interest still remained. Here is my collection of URL's on spectroscopy: http://www.fiz.uni-lj.si/astro/as_mon_1/iraf.html http://www.eso.org/projects/caos/ http://www.astrosurf.com/buil/ http://www.fiberguide.com/ http://www.jobinyvon.com/SiteResources/Data/Templates/1main.asp?DocID=2&v1ID =&lang= http://users.erols.com/njastro/faas/ http://astrosurf.com/thizy/lhires3/index-en.html http://www.shelyak.com/ http://mais-ccd-spectroscopy.com/ http://www.astroimagem.com/Espectro/spectroscope.htm http://astrosurf.com/vdesnoux/sas/sas.html http://tech.groups.yahoo.com/group/spectro-l/ http://www.astrosurf.com/buil/us/book2.htm http://astrosurf.com/vdesnoux/ http://www.spectrashift.com/ http://www.astroman.fsnet.co.uk/index.htm Enjoy. Jerry Foote ScopeCraft, Inc. 4175 E. Red Cliffs Dr. Kanab, UT 84741 435-216-5450 jfoote@scopecraft.com