I thought it would be interesting to compare spectra of chi Cygni and mu cephei as they are both famous red stars.
I used the on loan BAA objective prism on my 12inch F/6.8 astrograph stopped to 4 inches and an un-modified Canon 550 DSLR. Despite the limited spectral range of the DSLR the spectra are clearly quite different. Comparison spectra are on the Orwell Astronomical Society forum:
http://forum.oasi.org.uk/download/file.php?id=393&mode=view
Only a quick look at this stage, I hope to get a CCD spectrum with the same set up in the next few weeks.
I also observed visually and chi Cygni was clearly visible to the naked eye. And through my 4 inch F/5 guide scope mu Cephei appeared to be redder than chi Cygni.
Mike.