Hi Jeff,
I hope you don't mind a Pom who has never even seen Canopus
joining in but I think I can make a stab at it.
With a spectral type of F0i, Canopus is a supergiant at the hot end of the F class and so shows hydrogen Balmer lines like the A type stars. It also shows metallic lines like the G and K stars. The sodium D doublet (5890/5896) should be particularly clear. Sooooo.......
I think the narrow line in the Yellow is Sodium (not the broad line, that is an artifact caused by the gap between the green and red channels) The rightmost prominent line in the blue is probably H beta (4861) On that basis I had a go using vspec to produce the attached graph from your image and compared it with a F0i type star from the VSpec (pickles) library. The dispersion works out at about 8A/pixel. Armed with this calibration is is probably possible to identify the other Balmer lines and Fe and Mg are probably in there too.
Here is another spectrum of an F supergiant (Epsilon Aurigae) taken with the Star Analyser 100 in front a telephoto lens on a 350D.
http://www.threehillsobservatory.co....roscopy_11.htm
Best Wishes
Robin
www.threehillsobservatory.co.uk